Prof. Tomáš Cižmár Profile

Prof. Tomáš Cižmár

Head of Dept - Fibre Optics at Leibniz-Institut für Photonische Technologien eV

SPIE Involvement:

Conference Program Committee | Conference Chair | Editorial Board Member: Neurophotonics | Author | Editor

Profile Summary

My recent research activities are focused on Photonics in optically random environments (particularly multimode fibres) and deep-tissue in-vivo imaging.

Publications (78)

SPIE Journal Paper | 17 September 2024 Open Access

Special Guest Editorial: Exploiting Complex Media Photonics to Illuminate Brain’s Hidden Depth

Hana Uhlířová, Tomáš Čižmár, Janelle M. P. Pakan, André Gomes

NPh, Vol. 11, Issue S1, S11501, (September 2024) https://doi.org/10.1117/12.10.1117/1.NPh.11.S1.S11501

KEYWORDS: Brain, Photonics, Neurophotonics, Neuroscience, Neuroimaging, Multicore fiber, Wavefronts, Multimode fibers, In vivo imaging, Animals

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Proceedings Article | 20 June 2024 Presentation

STED microscopy at the tip of a holographic multimode fibre endoscope

André Gomes, Miroslav Stibůrek, Sergey Turtaev, Katharina Reglinski, Christian Eggeling, Tomáš Čižmár

Proceedings Volume PC13007, PC1300702 (2024) https://doi.org/10.1117/12.3022278

KEYWORDS: Multimode fibers, Holography, Endoscopes, Stimulated emission depletion microscopy, Microscopy, In vivo imaging, Neuroimaging, Brain, Diffraction limit, Biomedical optics

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Proceedings Article | 13 March 2024 Open Access

How to image anywhere in the brain through 100μ thin fibre

Tomáš Cižmár

Proceedings Volume PC12828, PC1282801 (2024) https://doi.org/10.1117/12.3023635

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SPIE Journal Paper | 13 February 2024 Open Access

Advancing the path to in-vivo imaging in freely moving mice via multimode-multicore fiber based holographic endoscopy

Yang Du, Evelyn Dylda, Miroslav Stibůrek, André D Gomes, Sergey Turtaev, Janelle M. P. Pakan, Tomáš Čižmár

NPh, Vol. 11, Issue S1, S11506, (February 2024) https://doi.org/10.1117/12.10.1117/1.NPh.11.S1.S11506

KEYWORDS: In vivo imaging, Multicore fiber, Multimode fibers, Brain, Animals, Structured optical fibers, Neurons, Digital micromirror devices, Neurophotonics, Neuroimaging

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SignificanceHair-thin multimode optical fiber-based holographic endoscopes have gained considerable interest in modern neuroscience for their ability to achieve cellular and even subcellular resolution during in-vivo deep brain imaging. However, the application of multimode fibers in freely moving animals presents a persistent challenge as it is difficult to maintain optimal imaging performance while the fiber undergoes deformations.AimWe propose a fiber solution for challenging in-vivo applications with the capability of deep brain high spatial resolution imaging and neuronal activity monitoring in anesthetized as well as awake behaving mice.ApproachWe used our previously developed M3CF multimode-multicore fiber to record fluorescently labeled neurons in anesthetized mice. Our M3CF exhibits a cascaded refractive index structure, enabling two distinct regimes of light transport that imitate either a multimode or a multicore fiber. The M3CF has been specifically designed for use in the initial phase of an in-vivo experiment, allowing for the navigation of the endoscope’s distal end toward the targeted brain structure. The multicore regime enables the transfer of light to and from each individual neuron within the field of view. For chronic experiments in awake behaving mice, it is crucial to allow for disconnecting the fiber and the animal between experiments. Therefore, we provide here an effective solution and establish a protocol for reconnection of two segments of M3CF with hexagonally arranged corelets.ResultsWe successfully utilized the M3CF to image neurons in anaesthetized transgenic mice expressing enhanced green fluorescent protein. Additionally, we compared imaging results obtained with the M3CF with larger numerical aperture (NA) fibers in fixed whole-brain tissue.ConclusionsThis study focuses on addressing challenges and providing insights into the use of multimode-multicore fibers as imaging solutions for in-vivo applications. We suggest that the upcoming version of the M3CF increases the overall NA between the two cladding layers to allow for access to high resolution spatial imaging. As the NA increases in the multimode regime, the fiber diameter and ring structure must be reduced to minimize the computational burden and invasiveness.

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SPIE Journal Paper | 19 January 2024 Open Access

“There’s plenty of room at the bottom”: deep brain imaging with holographic endo-microscopy

Hana Uhlířová, Miroslav Stibůrek, Tomáš Pikálek, André Gomes, Sergey Turtaev, Petra Kolbábková, Tomáš Čižmár

NPh, Vol. 11, Issue S1, S11504, (January 2024) https://doi.org/10.1117/12.10.1117/1.NPh.11.S1.S11504

KEYWORDS: Holography, Brain, Digital micromirror devices, In vivo imaging, Animals, Brain imaging, Wavefronts, Biological imaging, Neuroimaging, Image resolution

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Proceedings Article | 22 March 2023 Presentation + Paper

New ways to look through multimode optical fibres

David Phillips, Shuhui Li, Unė Būtaitė, Hlib Kupianskyi, Simon A. Horsley, Tomáš Čižmár

Proceedings Volume 12388, 123880E (2023) https://doi.org/10.1117/12.2668358

KEYWORDS: Optical fibers, Wavefronts, Optical components, Image resolution, Endoscopes, Atmospheric optics

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Proceedings Article | 13 December 2022 Paper

Custom: terminated multimode fibre probe for holographic micro-endoscopy

Miroslav Stibůrek, Petr Jákl, Tomáš Pikálek, Petra Ondráčková, Tomáš Čižmár

Proceedings Volume 12502, 1250211 (2022) https://doi.org/10.1117/12.2664219

KEYWORDS: Polishing, Etching, Multimode fibers, Holography, Optical fibers, Tissues, Tissue optics, Particles, Manufacturing, Endoscopy

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SPIE Journal Paper | 27 April 2022 Open Access

Neurophotonic tools for microscopic measurements and manipulation: status report

Ahmed Abdelfattah, Srinivasa Rao Allu, Robert Campbell, Xiaojun Cheng, Tomáš Cižmár, Irene Costantini, Valentina Emiliani, Natalie Fomin-Thunemann, Ariel Gilad, Tomás Fernández Alfonso, Christopher G. Ferri, Andrew Harris, Elizabeth M. Hillman, Matthew Holt, Kivilcim Kiliç, Evan Miller, Rickson Mesquita, K.M. Naga Srinivas Nadella, U. Valentin Nägerl, Citlali Perez Campos, Francesca Puppo, Shy Shoham, R. Angus Silver, Vivek Srinivasan, Martin Thunemann, Lei Tian, Sergei Vinogradov, Flavia Vitale, Hana Uhlířová, Chris Xu, Mu-Han Yang, Yongxin Zhao, Sapna Ahuja, Taner Akkin, Joshua Brake, David Boas, Erin Buckley, Anderson Chen, Massimo De Vittorio, Anna Devor, Patrick Doran, Mirna El Khatib, Yeshaiahu Fainman, Xue Han, Ute Hochgeschwender, Na Ji, Evelyn Lake, Lei Li, Tianqi Li, Philipp Mächler, Yusuke Nasu, Axel Nimmerjahn, Petra Ondrácková, Francesco Pavone, Darcy Peterka, Filippo Pisano, Ferruccio Pisanello, Bernardo Sabatini, Sanaz Sadegh, Sava Sakadžic, Sanaya Shroff, Ruth Sims, Spencer Smith, Lin Tian, Thomas Troxler, Antoine Valera, Alipasha Vaziri, Lihong Wang, Changhuei Yang, Gary Yellen, Ofer Yizhar

NPh, Vol. 9, Issue S1, 013001, (April 2022) https://doi.org/10.1117/12.10.1117/1.NPh.9.S1.013001

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Proceedings Article | 3 March 2022 Presentation + Paper

3D imaging through a single optical fiber

Daan Stellinga, David Phillip, Simon Mekhail, Adam Selyem, Sergey Turtaev, Tomáš Cižmár, Miles Padgett

Proceedings Volume 12016, 120160M (2022) https://doi.org/10.1117/12.2616915

KEYWORDS: Optical fibers, Imaging systems, Multimode fibers, Digital micromirror devices

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Proceedings Article | 1 April 2020 Presentation + Paper

Coherent anti-Stokes Raman scattering microscopy through a multimode fiber endoscope

Johanna Trägårdh, Tomáš Pikálek, Mojmír Šerý, Denis Akimov, Tobias Meyer, Jürgen Popp, Tomáš Cižmár

Proceedings Volume 11359, 1135907 (2020) https://doi.org/10.1117/12.2555080

KEYWORDS: Multimode fibers, Spatial light modulators, Endoscopes, Polarization, Microscopy, CARS tomography, Signal detection, Second-harmonic generation, Speckle pattern, Calibration

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Proceedings Article | 24 February 2020 Presentation + Paper

Transport properties of optical fibres with high numerical apertures

T. Tyc, S. Simpson, T. Cižmár

Proceedings Volume 11297, 112970Y (2020) https://doi.org/10.1117/12.2550446

KEYWORDS: Polarization, Optical fibers, Endoscopy, Refractive index, Structured optical fibers, Radio propagation, Imaging systems, Superposition, Wave propagation, Electromagnetism

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Proceedings Article | 14 May 2019 Presentation

Harnessing multimode propagation for deep tissue imaging (Conference Presentation)

Tomáš Čižmár

Proceedings Volume 11029, 110290H (2019) https://doi.org/10.1117/12.2521261

KEYWORDS: Biomedical optics, Tissues, Modulation, Holography, Modulators, Endoscopes, Multimode fibers, Wavefronts, Microscopy, Digital micromirror devices

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The turbid nature of refractive index distribution, common for all living tissues, introduces severe aberrations to light propagation thereby severely compromising light-based observations using currently available non-invasive techniques. Numerous approaches of endoscopy, based mainly on fibre bundles or GRIN-lenses, allow imaging in extended depths of turbid tissues. Their footprint, however, causes profound mechanical damage to overlying regions and their imaging performance is very limited. Optical systems have traditionally been understood as assemblies of components acting in a predefined and determinate manner. This notion is currently undergoing a transformation due to rapid advances in the technology and methods for spatial light modulation. Computer-controlled holographic modulators now facilitate the deployment of unusual and complex optical media with properties that bring unique advantages to biomedical applications. Progress in this domain enabled a new generation of minimally invasive, high-resolution endoscopes by substitution of the Fourier-based image relays with a holographic control of light propagating through apparently randomizing multimode optical fibres. The use of multimode fibres (MMFs) as ultranarrow endoscopes is a promising example of this concept, since it allows one to overcome the trade-off between the size of the optical element and the attainable resolution. The nature of light transport through MMFs leads to the transformation (or scrambling) of incident wavefronts into seemingly random speckle patterns. Adaptive optics provide a means for overcoming this signal degradation. A number of recently developed techniques in this domain have enabled the randomized output fields to be tailored into any desired distribution across the distal fibre facet or an arbitrarily remote plane. The most common form of laser scanning microscopy relies on the formation of diffraction-limited foci behind the fibre, combined with image reconstruction from fluorescence signals that are collected and guided backwards. Digital micromirror devices (DMDs) have recently opened up a range of opportunities in this domain by increasing the achievable light modulation refresh rates by several orders of magnitude compared to well-established nematic liquid crystal-based devices. The foci behind a MMF can be scanned at several tens of kHz, thus acquiring images at speeds approaching video rates. Furthermore, it has also been shown that DMDs generate foci of higher quality compared to other modulators. Building on these advances, the focus of researchers is currently shifting towards implementations in biomedically relevant settings, including in vivo applications. I will review our fundamental and technological progression in this domain and introduce several applications of this concept in bio-medically relevant environments. I will present isotropic volumetric imaging modality based on advanced modes of light-sheet microscopy: by taking advantage of the cylindrical symmetry of the fibre, it is possible to facilitate the wavefront engineering methods for generation of both Bessel and structured Bessel beam plane illumination. Further, I will demonstrate the utilization of multimode fibres for imaging in living organism and present a new fibre-based geometry for deep tissue imaging in brain tissue of a living animal model. Lastly I will show the development and exploitation of highly specialised fibre probes for numerous advanced bio-photonics applications including high-resolution imaging and optical manipulation.

Proceedings Article | 4 March 2019 Paper

Exploiting digital micromirror device for holographic micro-endoscopy

Sergey Turtaev, Ivo Leite, Kevin Mitchell, Miles Padgett, David Phillips, Tomáš Čižmár

Proceedings Volume 10932, 1093203 (2019) https://doi.org/10.1117/12.2509429

KEYWORDS: Digital micromirror devices, Spatial light modulators

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Proceedings Article | 4 March 2019 Presentation

Holographic optical tweezers at the tip of a multimode fibre (Conference Presentation)

Ivo Leite, Sergey Turtaev, Xin Jiang, Martin Siler, Philip Russell, Tomáš Čižmár

Proceedings Volume 10886, 108860M (2019) https://doi.org/10.1117/12.2510418

KEYWORDS: Holography, Optical tweezers, Multimode fibers, Geometrical optics, Dielectrics, Step index fibers, Sodium, Microscopy

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Proceedings Article | 4 March 2019 Presentation

In-vivo deep-brain imaging through a single fibre endoscope (Conference Presentation)

Sergey Turtaev, Ivo Leite, Tristan Altwegg-Boussac, Janelle M. Pakan, Nathalie Rochefort, Tomas Cizmar

Proceedings Volume 10886, 1088604 (2019) https://doi.org/10.1117/12.2510432

KEYWORDS: Endoscopes, In vivo imaging, Neuroscience, Tissues, Holography, Multimode fibers, Image resolution, Imaging systems, Visual process modeling, Mode conditioning cables

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Proceedings Article | 20 February 2019 Presentation + Paper

Multimode fiber transmission matrix obtained with internal references

Petr Jákl, Martin Šiler, Jan Ježek, Johanna Trägårdh, Pavel Zemánek, Tomáš Čižmár

Proceedings Volume 10886, 1088610 (2019) https://doi.org/10.1117/12.2510668

KEYWORDS: Polarization, Multimode fibers, Holograms, Spatial light modulators, Optical fibers, Calibration, Cameras, Phase interferometry

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Proceedings Article | 20 February 2019 Presentation + Paper

Towards focusing broad band light through a multimode fiber endoscope

Johanna Trägårdh, Tomáš Pikálek, Stephen Simpson, Petr Jákl, Martin Šiler, Tomáš Tyc, Tomáš Čižmár

Proceedings Volume 10886, 108860J (2019) https://doi.org/10.1117/12.2510449

KEYWORDS: Spatial light modulators, Endoscopes, Multimode fibers, Dispersion, GRIN lenses, Phase measurement, Calibration, Polarization

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Proceedings Article | 15 March 2018 Presentation

Predicting the transmission matrix of graded index media (Conference Presentation)

Dirk Boonzajer Flaes, Jan Stopka, Sergey Turtaev, Stefan Witte, Johannes de Boer, Tom Tyc, Tomáš Čižmár

Proceedings Volume 10502, 105021C (2018) https://doi.org/10.1117/12.2290678

KEYWORDS: Refractive index, Graded index fibers, Multimode fibers, Tissue optics, Light scattering, Image resolution, Endoscopy, Geometrical optics, Cladding, Step index fibers

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Proceedings Article | 15 March 2018 Presentation

What is hiding in the transmission matrix of multimode fibres (Conference Presentation)

Tomáš Čižmár, Tomas Tyc

Proceedings Volume 10502, 1050219 (2018) https://doi.org/10.1117/12.2290193

KEYWORDS: Multimode fibers, Holography, Optical tweezers, Photonics, Endoscopes, Relays, Light wave propagation, Waveguides, Refractive index, Graded index fibers

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Proceedings Article | 25 August 2017 Paper

A biophotonics platform based on optical trapping of photonic membranes

Blair Kirkpatrick, Tomas Čižmár, Kishan Dholakia, Andrea Di Falco

Proceedings Volume 10347, 103472P (2017) https://doi.org/10.1117/12.2277184

KEYWORDS: Biomedical optics, Optical tweezers, Optical manipulation, Surface enhanced Raman spectroscopy, Holography, Optical design, Control systems, Robotics, Optical sorting, Lab on a chip

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Proceedings Article | 24 April 2017 Presentation

High-speed wavefront modulation in complex media (Conference Presentation)

Sergey Turtaev, Ivo Leite, Tomáš Cizmár

Proceedings Volume 10073, 1007313 (2017) https://doi.org/10.1117/12.2253151

KEYWORDS: Light wave propagation, Scattering media, Biomedical optics, Optical micromanipulation, Wavefronts, Spatial light modulators, Light scattering, High speed imaging, Modulation, Modulators

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Proceedings Article | 24 April 2017 Presentation

Exploiting multimode propagation for in-vivo endomicroscopy (Conference Presentation)

Tomáš Cizmár

Proceedings Volume 10073, 100730Z (2017) https://doi.org/10.1117/12.2252700

KEYWORDS: Refractive index, Image restoration, Photonics, Endoscopes, Light wave propagation, Tissues, In vivo imaging, Endomicroscopy, Wavefronts, Endoscopy

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Proceedings Article | 24 April 2017 Presentation

Generation of light-sheet at the end of multimode fibre (Conference Presentation)

Martin Plöschner, Véra Kollárová, Zbyněk Dostál, Jonathan Nylk, Thomas Barton-Owen, David E. Ferrier, Radim Chmelik, Kishan Dholakia, Tomáš Cizmár

Proceedings Volume 10073, 1007305 (2017) https://doi.org/10.1117/12.2250694

KEYWORDS: Tissue optics, Tissues, Microscopy, Multimode fibers, Endoscopy, Holography, Imaging systems, Luminescence, Biology, 3D image processing

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Proceedings Article | 16 September 2016 Presentation + Paper

All-optical manipulation of photonic membranes

Blair Kirkpatrick, Martin Ploschner, Tomas Čižmár, Andrea Di Falco

Proceedings Volume 9922, 99222A (2016) https://doi.org/10.1117/12.2238822

KEYWORDS: Optical tweezers, Promethium, Phase modulation, Silicon, Microscopes, Objectives, Physics, Photoresist materials, Polymers, Optical design

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Proceedings Article | 4 March 2016 Paper

Untangled modes in multimode waveguides

Martin Plöschner, Tomáš Tyc, Tomáš Čižmár

Proceedings Volume 9764, 97640Y (2016) https://doi.org/10.1117/12.2216205

KEYWORDS: Digital holography, Optical fibers, Holography, Endoscopes, Imaging systems, Waveguides, Fiber optics, Image transmission, Organisms, Tissues, Neuroscience, Refractive index, Wave propagation, Geometrical optics, Neodymium, Wavefronts, Standards development

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Proceedings Article | 22 December 2015 Paper

Multimode fibres: a pathway towards deep-tissue fluorescence microscopy

Martin Plöschner, Tomáš Tyc, Tomáš Čižmár

Proceedings Volume 9668, 966840 (2015) https://doi.org/10.1117/12.2202355

KEYWORDS: Microscopy, Optical fibers, Multimode fibers, Optical microscopy, Digital holography, Wavefronts, Life sciences, Biology, Biomedical optics, Adaptive optics, Tissues, Structured optical fibers, Image resolution, Holograms

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Proceedings Article | 23 September 2015 Paper

Untangled modes in multimode fibres for flexible microendoscopy

Martin Plöschner, Tomáš Tyc, Tomáš Čižmár

Proceedings Volume 9630, 96300E (2015) https://doi.org/10.1117/12.2191418

KEYWORDS: Polarization, Electroluminescent displays, Geometrical optics, Endoscopes, Imaging systems, Superposition, Waveguides, Light wave propagation, Bessel functions, Digital holography

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Proceedings Article | 10 March 2015 Paper

Fibre-based imaging: new challenges

Martin Plöschner, Branislav Straka, Kishan Dholakia, Tomáš Čižmár

Proceedings Volume 9335, 93350H (2015) https://doi.org/10.1117/12.2077693

KEYWORDS: Spatial light modulators, Holograms, Charge-coupled devices, Superposition, Polarization, Physics, Standards development, Computing systems, Control systems, Acousto-optics

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Proceedings Article | 10 March 2015 Paper

GPU accelerated holography for multimode fiber applications

Martin Plöschner, Tomáš Čižmár

Proceedings Volume 9335, 933507 (2015) https://doi.org/10.1117/12.2079334

KEYWORDS: Spatial light modulators, Evolutionary algorithms, Biomedical optics, Adaptive optics, Amplitude modulation, Holography, Single mode fibers, Control systems, Holograms, Polarization

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Proceedings Article | 5 December 2014 Paper

Tractor beam in micro-scale

O. Brzobohatý, V. Karásek, M. Šiler, L. Chvátal, T. Čižmár, P. Zemánek

Proceedings Volume 9441, 944104 (2014) https://doi.org/10.1117/12.2176010

KEYWORDS: Particles, Gaussian beams, Beam propagation method, Polarization, Optical spheres, Laser beam propagation, Spherical lenses, Mirrors, Dielectrics, Solar sails

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Proceedings Article | 7 March 2014 Paper

Femtosecond optical injection of intact plant cells using a reconfigurable platform

Claire Mitchell, Stefan Kalies, Tomas Cizmar, Nicola Bellini, Anisha Kubasik-Thayil, Alexander Heisterkamp, Lesley Torrance, Alison Roberts, Frank Gunn-Moore, Kishan Dholakia

Proceedings Volume 8972, 89720C (2014) https://doi.org/10.1117/12.2037784

KEYWORDS: Bessel beams, Femtosecond phenomena, Gaussian beams, Pulsed laser operation, Molecules, Luminescence, Biomedical optics, Laser beam propagation, Microscopes, Laser optics

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Proceedings Article | 12 September 2013 Paper

Experimental demonstration of optical transport, sorting and self arrangement using a "tractor beam"

O. Brzobohatý, V. Karásek, M. Šiler, L. Chvátal, T. Čižmár, P. Zemánek

Proceedings Volume 8810, 881003 (2013) https://doi.org/10.1117/12.2023955

KEYWORDS: Particles, Polarization, Beam propagation method, Gaussian beams, Photons, Optical spheres, Adaptive optics, Optical tweezers, Mirrors, Dielectrics

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Proceedings Article | 22 March 2013 Paper

Exploiting multimode waveguides for pure fibre based fluorescence imaging

Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 8572, 85720S (2013) https://doi.org/10.1117/12.2003798

KEYWORDS: Microscopy, Geometrical optics, Waveguides, Gradient-index optics, Image resolution, Spatial light modulators, Light wave propagation, Spiral phase plates, Imaging systems, Endoscopes

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Proceedings Article | 5 March 2013 Paper

Single laser beam based passive optical sorter

O. Brzobohatý, V. Karasek, M. Šiler, L. Chvatal, T. Cizmar, P. Zemanek

Proceedings Volume 8637, 863715 (2013) https://doi.org/10.1117/12.2004370

KEYWORDS: Particles, Polarization, Gaussian beams, Mirrors, Photons, Optical spheres, Scattering, Beam propagation method, Wave propagation, Switching

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Proceedings Article | 5 March 2013 Paper

Optical manipulation, beam-shaping and scanner-free bright-ﬁeld and dark-ﬁeld imaging via multimode optical ﬁbre

Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 8637, 86370G (2013) https://doi.org/10.1117/12.2003820

KEYWORDS: Geometrical optics, Electroluminescent displays, Spatial light modulators, Polarization, Imaging systems, Particles, Calibration, Holograms, Optical manipulation, Charge-coupled devices

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Proceedings Article | 5 March 2013 Paper

The role of propagation invariant light modes in single and multi-photon imaging

T. Vettenburg, H. Dalgarno, T. Čižmár, K. Dholakia

Proceedings Volume 8637, 86370I (2013) https://doi.org/10.1117/12.2003881

KEYWORDS: Bessel beams, Microscopy, Beam propagation method, Objectives, Luminescence, Modulation transfer functions, Image resolution, Light wave propagation, Microscopes, Confocal microscopy

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Proceedings Article | 22 February 2013 Paper

Increasing the resolution of light sheet microscopy in the presence of aberrations

T. Vettenburg, H. Dalgarno, T. Čižmár, F. Gunn-Moore, K. Dholakia

Proceedings Volume 8589, 858912 (2013) https://doi.org/10.1117/12.2003828

KEYWORDS: Microscopy, Objectives, Aberration correction, Tissue optics, Microscopes, 3D image processing, Luminescence, Charge-coupled devices, Fluorescence spectroscopy, Laser beam diagnostics

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Proceedings Article | 18 December 2012 Paper

Behaviour of self-arranged chain of colloidal particles in a travelling standing wave

Pavel Zemánek, Martin Šiler, Tomáš Čižmár

Proceedings Volume 8697, 86970V (2012) https://doi.org/10.1117/12.2007232

KEYWORDS: Particles, Optical tweezers, Wave propagation, Optical binding, Optical arrays, Electroluminescent displays, Prisms, Thermography, Mirrors, Beam splitters

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Proceedings Article | 10 October 2012 Paper

Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance

Martin Ploschner, Tomáš Čižmar, Michael Mazilu, Andrea Di Falco, Kishan Dholakia

Proceedings Volume 8458, 84581L (2012) https://doi.org/10.1117/12.928482

KEYWORDS: Nanoparticles, Gold, Particles, Plasmons, Optical sorting, Interfaces, Scattering, Laser scattering, Charge-coupled devices, Surface enhanced Raman spectroscopy

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Proceedings Article | 10 October 2012 Paper

Multimode fibre as a light mode convertor: principles and applications

Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 8458, 845820 (2012) https://doi.org/10.1117/12.928947

KEYWORDS: Polarization, Spatial light modulators, Geometrical optics, Electroluminescent displays, Charge-coupled devices, Optical tweezers, Objectives, Particles, Holography, Biomedical optics

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Proceedings Article | 10 October 2012 Paper

Faster optical delivery of self-arranged multi-particle cluster

Martin Šiler, Tomáš Čižmár, Pavel Zemánek

Proceedings Volume 8458, 84581K (2012) https://doi.org/10.1117/12.929709

KEYWORDS: Particles, Optical tweezers, Wave propagation, Optical arrays, Microfluidics, Optical binding, Prisms, Mirrors, Beam splitters, Polarization

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Proceedings Article | 11 October 2011 Paper

Advanced optical manipulation with tailored counter-propagating laser beams

Oto Brzobohatý, Tomas Čižmár, Vitezslav Karásek, Pavel Zemánek

Proceedings Volume 8306, 83061D (2011) https://doi.org/10.1117/12.911992

KEYWORDS: Particles, Gaussian beams, Spatial light modulators, Optical tweezers, Computing systems, Bessel beams, Optical manipulation, Human-machine interfaces, Microfluidics, Beam shaping

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Proceedings Article | 8 September 2011 Paper

Modelling of optical trapping

Martin Šiler, Vítězslav Karásek, Oto Brzobohatý, Tomáš Čižmár, Pavel Zemánek

Proceedings Volume 8007, 80071C (2011) https://doi.org/10.1117/12.905438

KEYWORDS: Particles, Bessel beams, Optical tweezers, Axicons, Electromagnetism, Radio propagation, Gaussian beams, Refractive index, Geometrical optics, Modeling

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Proceedings Article | 17 February 2011 Paper

Optical sculpting: trapping through disorder and transfer of orbital angular momentum

T. Cižmár, M. Mazilu, H. Dalgarno, P. Ashok, F. Gunn-Moore, K. Dholakia

Proceedings Volume 7950, 79500R (2011) https://doi.org/10.1117/12.876357

KEYWORDS: Particles, Optical tweezers, Spatial light modulators, Superposition, Modulation, Microscopes, Holography, Scattering, Adaptive optics, Spiral phase plates

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Proceedings Article | 15 December 2010 Paper

Flexible dual-beam geometry for advanced optical micromanipulation experiments

Oto Brzobohatý, Tomáš Čižmár, Kishan Dholakia, Pavel Zemánek

Proceedings Volume 7746, 77461C (2010) https://doi.org/10.1117/12.882124

KEYWORDS: Particles, Spatial light modulators, Gaussian beams, Phase shift keying, Optical tweezers, Computing systems, Visualization, Microfluidics, Human-machine interfaces, Spatial filters

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Proceedings Article | 28 August 2010 Paper

Formation of one-dimensional optically bound structures of polystyrene particles near the surface

Oto Brzobohatý, Vítězslav Karásek, Pavel Zemánek, Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 7762, 776212 (2010) https://doi.org/10.1117/12.860364

KEYWORDS: Particles, Mirrors, Optical binding, Optical tweezers, Gaussian beams, Code division multiplexing, Optical testing, Astronomical imaging, Glasses, Objectives

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Proceedings Article | 28 August 2010 Paper

In situ wavefront optimization: towards the ideal performance of a biophotonics system

Tomáš Cižmár, Michael Mazilu, Kishan Dholakia

Proceedings Volume 7762, 776228 (2010) https://doi.org/10.1117/12.862755

KEYWORDS: Spatial light modulators, Optical tweezers, Wavefronts, Adaptive optics, Objectives, Particles, Phase shift keying, Wavefront distortions, Modulation, Biomedical optics

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Proceedings Article | 22 August 2009 Paper

Supercontinuum Airy beams

Jill Morris, Michael Mazilu, Jörg Baumgartl, Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 7430, 74300W (2009) https://doi.org/10.1117/12.826098

KEYWORDS: Spatial light modulators, Spatial coherence, Holograms, Wave propagation, Beam propagation method, Interference filters, Gaussian beams, Supercontinuum sources, Light wave propagation, Diffraction

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Proceedings Article | 22 August 2009 Paper

Accelerating vortices in Airy beams

Michael Mazilu, Joerg Baumgartl, Tomas Čižmár, Kishan Dholakia

Proceedings Volume 7430, 74300C (2009) https://doi.org/10.1117/12.826372

KEYWORDS: Spatial light modulators, Beam propagation method, Spiral phase plates, Gaussian beams, Fourier transforms, Phase measurement, Physics, Nondiffracting beams, Wave propagation, Singular optics

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Proceedings Article | 20 August 2009 Paper

Axial intensity shaping of a Bessel beam

Tomáš Čižmár, Kishan Dholakia

Proceedings Volume 7400, 74001Q (2009) https://doi.org/10.1117/12.826297

KEYWORDS: Bessel beams, Axicons, Spatial frequencies, Beam propagation method, Fourier transforms, Gaussian beams, Diffraction, Free space, Optical tweezers, Spatial light modulators

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Proceedings Article | 20 November 2008 Paper

One-dimensional long-range self-arranged optically bound structures

Oto Brzobohatý, Vítìzslav Karàsek, Tomáš Čižmár, Pavel Zemánek, Veneranda Garcés-Chávez, Kishan Dholakia

Proceedings Volume 7141, 714113 (2008) https://doi.org/10.1117/12.822384

KEYWORDS: Particles, Bessel beams, CCD cameras, Optical tweezers, Wavelets, Modulation, Axicons, Code division multiplexing, Optical binding, Beam propagation method

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Proceedings Article | 20 November 2008 Paper

Quasi-Bessel beam generated by oblate-tip axicon

Oto Brzobohatý, Tomáš Cižmár, Pavel Zemánek

Proceedings Volume 7141, 714126 (2008) https://doi.org/10.1117/12.822425

KEYWORDS: Axicons, Beam propagation method, Beam shaping, Modulation, Telescopes, Wave propagation, Gaussian beams, Diffraction, Optical testing, Bessel beams

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Proceedings Article | 18 November 2008 Paper

Optically bound chain of microparticles

Pavel Zemánek, Oto Brzobohaty, Vítezslav Karásek, Tomás Cizmár, Veneranda Garcés-Chávez, Kishan Dholakia

Proceedings Volume 7138, 713825 (2008) https://doi.org/10.1117/12.818076

KEYWORDS: Particles, Bessel beams, Beam propagation method, Optical binding, Optical tweezers, Modulation, Code division multiplexing, Wavelets, Axicons, CCD cameras

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Proceedings Article | 18 November 2008 Paper

Delivery of multiparticle chains by an optical conveyor belt

Martin Siler, Tomás Cizmár, Alexandr Jonás, Pavel Zemánek

Proceedings Volume 7138, 713822 (2008) https://doi.org/10.1117/12.818071

KEYWORDS: Particles, Optical tweezers, Optical arrays, Wave propagation, Optical spheres, Optical binding, Cameras, Beam splitters, Prisms, Mirrors

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Proceedings Article | 17 September 2008 Paper

Polarisation distribution for internal conical diffraction and the superposition of zero and first order Bessel beams

D. O'Dwyer, C. Phelan, Y. Rakovich, T. Cizmar, K. Dholakia, J. Donegan, J. Lunney

Proceedings Volume 7062, 70620W (2008) https://doi.org/10.1117/12.804258

KEYWORDS: Polarization, Bessel beams, Geometrical optics, Crystals, Diffraction, Superposition, Refraction, Laser crystals, Beam propagation method, Gaussian beams

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Proceedings Article | 12 September 2008 Paper

Laser beam interference and its applications in optical micromanipulation

Tomáš Čižmár, Pavel Zemánek, Martin Šiler, Veneranda Garcés-Chávez, Kishan Dholakia, Věra Kollárová, Zdeněk Bouchal

Proceedings Volume 7062, 70620U (2008) https://doi.org/10.1117/12.794523

KEYWORDS: Particles, Bessel beams, Optical tweezers, Gaussian beams, Wave propagation, Mirrors, Axicons, Nondiffracting beams, Laser scattering, Scattering

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Proceedings Article | 9 September 2008 Paper

Stability and dynamics of self-arranged structures in longitudinal optical binding

Oto Brzobohatý, Vítezslav Karásek, Tomáš Čižmár, Pavel Zemánek, Veneranda Garcés-Chávez, Kishan Dholakia

Proceedings Volume 7038, 70380O (2008) https://doi.org/10.1117/12.794681

KEYWORDS: Particles, Bessel beams, Optical binding, Beam propagation method, Optical tweezers, Wavelets, Modulation, Axicons, CCD cameras, Code division multiplexing

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Proceedings Article | 29 August 2008 Paper

Generation and control of multiple Bessel beams for optical micromanipulation

T. Čižmár, V. Kollárová, X. Tsampoula, F. Gunn-Moore, Z. Bouchal, K. Dholakia

Proceedings Volume 7038, 70380Q (2008) https://doi.org/10.1117/12.794944

KEYWORDS: Bessel beams, Modulation, Phase shift keying, Axicons, Gaussian beams, Optical tweezers, Optical micromanipulation, Phase modulation, Particles, Linear filtering

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Proceedings Article | 29 August 2008 Paper

Novel dual beam fiber traps using endlessly single-mode photonic crystal fiber

David Gherardi, Antonia Carruthers, Tomáš Čižmár, Robert Marchington, Kishan Dholakia

Proceedings Volume 7038, 703828 (2008) https://doi.org/10.1117/12.794828

KEYWORDS: Particles, Optical spheres, Photonic crystal fibers, Capillaries, Scattering, Laser scattering, Optical micromanipulation, Supercontinuum sources, Light, Optical tweezers

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Proceedings Article | 12 April 2007 Paper

Manufacturing of extremely narrow polymer fibers by non-diffracting beams

Jan Ježek, Tomáš Čižmár, Pavel Zemánek

Proceedings Volume 6609, 66090J (2007) https://doi.org/10.1117/12.739498

KEYWORDS: Optical fibers, Polymers, Bessel beams, Axicons, Photopolymerization, Telescopes, Manufacturing, Nondiffracting beams, Ultraviolet radiation, Beam propagation method

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Proceedings Article | 12 April 2007 Paper

Orbital angular momentum of mixed vortex beams

Z. Bouchal, V. Kollárová, P. Zemánek, T. Čižmár

Proceedings Volume 6609, 660907 (2007) https://doi.org/10.1117/12.739370

KEYWORDS: Spiral phase plates, Wavefronts, Radio propagation, Electromagnetism, Scanning probe microscopy, Composites, Optical vortices, Superposition, Beam propagation method, Microscopes

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Proceedings Article | 11 April 2007 Paper

How to use laser radiative and evanescent interference fields to control movement of the sub-micron objects

Pavel Zemánek, Tomáš Čižmár, Martin Šiler, Veneranda Garcés-Chávez, Kishan Dholakia, Věra Kollárová, Zdeněk Bouchal

Proceedings Volume 6609, 660902 (2007) https://doi.org/10.1117/12.739338

KEYWORDS: Particles, Bessel beams, Optical tweezers, Gaussian beams, Mirrors, Wave propagation, Axicons, Nondiffracting beams, Polarization, Laser scattering

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