Prof. Ajoy Kumar Kar Profile

Prof. Ajoy Kumar Kar

Professor at Heriot Watt Univ

SPIE Involvement:

Author

Publications (36)

Proceedings Article | 17 September 2018 Presentation

Controlled optical manipulation of particles within a buried microfluidic network (Conference Presentation)

Lynn Paterson, Anusha Keloth, Melanie Jimenez, Ajoy Kar

Proceedings Volume 10723, 1072316 (2018) https://doi.org/10.1117/12.2323670

KEYWORDS: Particles, Microfluidics, Optical manipulation, Waveguides, Multiphoton lithography, Ultrafast lasers, Wet etching, Fabrication, Visualization, Light scattering

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Proceedings Article | 14 March 2018 Presentation

Laser micromachined SERS substrates in etched fused silica (Conference Presentation)

Katie Murphy , Mark Mackenzie, Haonan Chi, Manoj Varma, Parama Pal, Lynn Paterson, Ajoy Kar

Proceedings Volume 10522, 105220E (2018) https://doi.org/10.1117/12.2290195

KEYWORDS: Silver, Ultrafast lasers, Silica, Micromachining, Biomedical optics, Raman spectroscopy, Microfluidics, Nanoparticles, Raman scattering, Ultrafast phenomena

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SPIE Journal Paper | 27 December 2017

Geometrical effect characterization of femtosecond-laser manufactured glass microfluidic chips based on optical manipulation of submicroparticles

Domna Kotsifaki, Mark Mackenzie, Georgia Polydefki, Ajoy K. Kar, Mersini Makropoulou, Alexandros A. Serafetinides

OE, Vol. 56, Issue 12, 124111, (December 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.12.124111

KEYWORDS: Microfluidics, Glasses, Optical tweezers, Particles, Optics manufacturing, Nanoparticles, Optical manipulation, Fabrication, Geometrical optics, Numerical simulations

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Proceedings Article | 17 February 2017 Paper

Cr:ZnSe guided wave lasers and materials

Sean McDaniel, Adam Lancaster, Ronald Stites, Fiona Thorburn, Ajoy Kar, Gary Cook

Proceedings Volume 10082, 100820D (2017) https://doi.org/10.1117/12.2260670

KEYWORDS: Waveguides, Waveguide lasers, Mode locking, Ions, Crystals, Chromium, Laser resonators, Laser crystals, Pulsed laser operation, Continuous wave operation

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Proceedings Article | 27 April 2016 Presentation

Vitamin C for stabilising biological lasers (Conference Presentation)

Ajoy Kar, Mark Mackenzie, Katarzyna Cialowicz, Rebecca Saleeb, Rory Duncan

Proceedings Volume 9711, 97111K (2016) https://doi.org/10.1117/12.2211720

KEYWORDS: Laser stabilization, Laser marking, Fluorescent proteins, Oxygen, Kidney, Dielectrics, Dielectric mirrors, Mirrors, Laser resonators, Femtosecond phenomena

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Proceedings Article | 26 April 2016 Presentation

Femtosecond laser fabricated integrated chip for manipulation of single cells (Conference Presentation)

Anusha Keloth, Melanie Jimenez, H. Bridle, Lynn Paterson, Gerard Markx, Ajoy Kar

Proceedings Volume 9705, 97050K (2016) https://doi.org/10.1117/12.2212719

KEYWORDS: Microfluidics, Waveguides, Femtosecond phenomena, Ultrafast lasers, Wet etching, Optical micromanipulation, Optical tweezers, Continuous wave operation, Laser sources, Laser scattering

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Proceedings Article | 17 July 2015 Paper

Photosensitivity study of GeS2 chalcogenide glass under femtosecond laser pulses irradiation

Arunbabu Ayiriveetil, Tamilarasan Sabapathy, Ajoy Kar, Sundarrajan Asokan

Proceedings Volume 9524, 95242B (2015) https://doi.org/10.1117/12.2189653

KEYWORDS: Waveguides, Glasses, Chalcogenide glass, Femtosecond phenomena, Fusion energy, Photonics, Signal attenuation, Ultrafast lasers, Near field optics, Multiphoton lithography

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Proceedings Article | 5 March 2015 Paper

Three-dimensional optofluidic device for isolating microbes

A. Keloth, L. Paterson, G. Markx, A. Kar

Proceedings Volume 9320, 93200Z (2015) https://doi.org/10.1117/12.2078852

KEYWORDS: Waveguides, Microfluidics, Microorganisms, Ocean optics, Particles, Scattering, Laser scattering, Silica, Laser beam propagation, Femtosecond phenomena

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Proceedings Article | 20 February 2015 Paper

Gain-switched operation of ultrafast laser inscribed waveguides in Cr:ZnSe

Sean McDaniel, Patrick Berry, Kenneth Schepler, John Macdonald, Stephen Beecher, Ajoy Kar

Proceedings Volume 9342, 93420E (2015) https://doi.org/10.1117/12.2079396

KEYWORDS: Waveguides, Pulsed laser operation, Waveguide lasers, Ultrafast lasers, Absorption, Continuous wave operation, Wave propagation, Mirrors, Crystals, Sensors

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Proceedings Article | 20 February 2014 Paper

Broadband IR supercontinuum generation in hexagonal lattice tellurite photonic crystal fiber with dispersion optimized for pumping over 1500 nm

Mariusz Klimczak, Grzegorz Stępniewski, Henry Bookey, Dariusz Pysz, Andrew Waddie, Ryszard Stępień, Ajoy Kar, Mohammad Taghizadeh, Ryszard Buczyński

Proceedings Volume 8964, 89640V (2014) https://doi.org/10.1117/12.2039979

KEYWORDS: Solitons, Glasses, Supercontinuum generation, Dispersion, Signal attenuation, Photonic crystal fibers, Fiber lasers, Scanning electron microscopy, Wave propagation, Picosecond phenomena

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Proceedings Article | 12 September 2013 Paper

Heat in optical tweezers

B. del Rosal, P. Haro-González, W. Ramsay, L. Maestro, K. Santacruz-Gómez, M. C. Iglesias-de la Cruz, F. Sanz-Rodríguez, J. Y. Chooi, P. Rodríguez-Sevilla, D. Choudhury, A. Kar, J. García Solé, L. Paterson, D. Jaque

Proceedings Volume 8810, 88102A (2013) https://doi.org/10.1117/12.2027750

KEYWORDS: Optical tweezers, Absorption, Luminescence, Temperature metrology, Particles, Objectives, Microscopes, Thermometry, Microfluidics, Rhodamine B

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Proceedings Article | 26 June 2013 Paper

Low loss waveguide on chalcogenide glass using ultrafast laser at low repetition rate

Tamilarasan Sabapathy, Gayathri Sivakumar, Arunbabu Ayiriveetil, Ajoy Kar, Sundarrajan Asokan

Proceedings Volume 8769, 87693U (2013) https://doi.org/10.1117/12.2018761

KEYWORDS: Waveguides, Glasses, Chalcogenide glass, Raman spectroscopy, Ultrafast lasers, Optical fibers, Pulsed laser operation, Refractive index, Near field, X-ray diffraction

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Proceedings Article | 22 June 2013 Paper

Photo-thermal modifications in ultrafast laser inscribed chalcogenide glass waveguides

Gayathri Sivakumar, Tamilarasan Sabapathy, Arunbabu Ayiriveetil, Ajoy Kar, Sundarrajan Asokan

Proceedings Volume 8769, 87692L (2013) https://doi.org/10.1117/12.2018943

KEYWORDS: Waveguides, Glasses, Pulsed laser operation, Chalcogenide glass, Finite-difference time-domain method, Ultrafast lasers, Diffusion, Thermal modeling, Refractive index, Multiphoton lithography

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Proceedings Article | 19 November 2012 Paper

Mid-infrared photonics enabled by 3D laser writing chalcogenide glass

A. Ródenas, J. McCarthy, N. Psaila, G. Brown, H. Bookey, R. Thomson, A. Kar

Proceedings Volume 8542, 854217 (2012) https://doi.org/10.1117/12.979034

KEYWORDS: Waveguides, Glasses, Chalcogenide glass, Refractive index, Nonlinear optics, Fabrication, Photonics, Pulsed laser operation, Chalcogenides, Mid-IR

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Proceedings Article | 12 September 2012 Paper

Advances in the development of mid-infrared integrated devices for interferometric arrays

Lucas Labadie, Guillermo Martín, Airán Ródenas, Norman Anheier, Brahim Arezki, Robert Thomson, Hong Qiao, Pierre Kern, Ajoy Kar, Bruce Bernacki

Proceedings Volume 8445, 844515 (2012) https://doi.org/10.1117/12.925636

KEYWORDS: Waveguides, Interferometry, Mid-IR, Photonics, Glasses, Integrated optics, Optical filters, Optical fibers, Chalcogenide glass, Astronomy

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Proceedings Article | 16 May 2012 Paper

Toward mid-IR supercontinuum generation in bismuth-lead-galate glass based photonic crystal fibers

Ryszard Buczynski, Henry Bookey, Ryszard Stepien, Jacek Pniewski, Dariusz Pysz, Andrew Waddie, Ajoy Kar, Mohammad Taghizadeh

Proceedings Volume 8434, 84340Z (2012) https://doi.org/10.1117/12.922747

KEYWORDS: Glasses, Dispersion, Photonic crystal fibers, Optical fibers, Supercontinuum generation, Mid-IR, Cladding, Femtosecond phenomena, Spectrometers, Infrared radiation

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Proceedings Article | 29 November 2011 Paper

Ultrafast laser inscription: science today, technology tomorrow

D. Choudhury, W. Ramsay, N. Willoughby, L. Paterson, A. Kar

Proceedings Volume 8307, 83070D (2011) https://doi.org/10.1117/12.903689

KEYWORDS: Waveguides, Ultrafast lasers, Microfluidics, Etching, Fabrication, Diagnostics, 3D metrology, Integrated optics, Biomedical optics, Lab on a chip

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Proceedings Article | 15 February 2011 Paper

A femtosecond laser inscribed biochip for stem cell therapeutic applications

D. Choudhury, W. Ramsay, G. Brown, N. Psaila, S. Beecher, R. Thomson, R. Kiss, S. Pells, N. Willoughby, L. Paterson, A. Kar

Proceedings Volume 7929, 79290P (2011) https://doi.org/10.1117/12.874954

KEYWORDS: Stem cells, Femtosecond phenomena, Microfluidics, Silica, Etching, Laser therapeutics, Wet etching, Diagnostics, Leukemia, Microfabrication

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Proceedings Article | 22 July 2010 Paper

Defining requirements and identifying relevant technologies in astrophotonics

Jeremy Allington-Smith, Timothy Birks, Joss Bland-Hawthorn, Colin Cunningham, Sonali Dagupta, Roger Haynes, Paulo J. Garcia, Ajoy Kar, Andreas Kelz, Pierre Kern, Lucas Labadie, Jon Lawrence, Etienne Le Coarer, Martin Roth, Stefano Minardi, Ray Sharples, Robert Thomson

Proceedings Volume 7739, 773925 (2010) https://doi.org/10.1117/12.857228

KEYWORDS: Astrophotonics, Interferometry, Waveguides, Astronomy, Sensors, Photonic devices, Spectroscopy, Integrated optics, Spectrographs, Telescopes

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Proceedings Article | 5 October 2009 Paper

Sensing properties of germanate and tellurite glass optical fibres

Hongxia Li, Joris Lousteau, Rui Suo, Xin Jiang, William MacPherson, Henry Bookey, James Barton, Ajoy Kar, Lin Zhang, Animesh Jha, Ian Bennion

Proceedings Volume 7503, 75032O (2009) https://doi.org/10.1117/12.835317

KEYWORDS: Fiber Bragg gratings, Glasses, Interferometers, Silica, Fabry–Perot interferometers, Optical fibers, Fabry–Perot interferometry, Refractive index, Sensors, Optical testing

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Proceedings Article | 5 August 2009 Paper

Recent advances in mid-IR optical fibres for chemical and biological sensing in the 2-15um spectral range

Animesh Jha, Xin Jiang, Joris Lousteau, Billy Richards, Hongxia Li, William MacPherson, Henry Bookey, James Barton, Ajoy Kar, Yuen Tsang, David Binks

Proceedings Volume 7386, 73860V (2009) https://doi.org/10.1117/12.840477

KEYWORDS: Mid-IR, Glasses, Sensors, Spectroscopy, Chemical analysis, Refractive index, Absorption, Optical fibers, Raman spectroscopy, Oxides

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Proceedings Article | 11 July 2009 Paper

Comparative evaluation of ultrafast laser beam interaction with the silvering in late Roman coins

A. Serafetinides, E. Drakaki, E. Fabrikesi, M. Kandyla, I. Zergioti, C. Vlachou-Mogire, R. Thomson, A. Kar, N. Boukos, A. Karydas

Proceedings Volume 7391, 73910P (2009) https://doi.org/10.1117/12.827244

KEYWORDS: Silver, Corrosion, Copper, Plating, Pulsed laser operation, Nd:YAG lasers, Laser systems engineering, Femtosecond phenomena, Picosecond phenomena, Semiconductor lasers

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Proceedings Article | 15 February 2008 Paper

Efficient second harmonic generation in femtosecond laser written optical waveguides on periodically poled lithium niobate

Roberto Osellame, Nicola Chiodo, Mirko Lobino, Marco Marangoni, Giulio Cerullo, Roberta Ramponi, Henry Bookey, Robert Thomson, Nicholas Psaila, Ajoy Kar

Proceedings Volume 6881, 688112 (2008) https://doi.org/10.1117/12.763115

KEYWORDS: Waveguides, Femtosecond phenomena, Lithium niobate, Wave propagation, Second-harmonic generation, Harmonic generation, Fabrication, Polarization, Nonlinear crystals, Waveguide modes

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Proceedings Article | 2 July 2007 Paper

Thermal response of tellurite glass optical fibre

Hongxia Li, Joris Lousteau, Henry Bookey, William MacPherson, James Barton, Ajoy Kar, Animesh Jha

Proceedings Volume 6619, 66190O (2007) https://doi.org/10.1117/12.738399

KEYWORDS: Silica, Glasses, Fabry–Perot interferometers, Optical fibers, Temperature metrology, Refractive index, Interferometers, Fusion splicing, Phase measurement, Lithium

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Proceedings Article | 10 June 2006 Paper

Crack growth behavior of silicate thin films prepared by pulsed laser deposition

A. P. Caricato, A. Fazzi, A. Jha, A. Kar, G. Leggieri, A. Luches, M. Martino, F. Romano, S. Shen, R. Thomson, T. Tunno

Proceedings Volume 6344, 63442F (2006) https://doi.org/10.1117/12.693640

KEYWORDS: Waveguides, Scanning electron microscopy, Refractive index, Erbium, Thin films, Pulsed laser deposition, Etching, Silicates, Silicate glass, Excimer lasers

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Proceedings Article | 1 November 2005 Paper

Characterisation and control of white-light supercontinuum filaments in condensed media: application to remote sensing

Kevin Cook, Ajoy Kar, Robert Lamb

Proceedings Volume 5984, 598406 (2005) https://doi.org/10.1117/12.631640

KEYWORDS: Remote sensing, Glasses, Cameras, Refractive index, Microlens array, CCD cameras, Diffraction, Pulsed laser operation, Near field diffraction, Scanning probe microscopy

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Proceedings Article | 23 December 2004 Paper

Phase stability and diffraction effects in self-focused white-light filaments in water and glass

Robert Lamb, Kevin Cook, Ajoy Kar

Proceedings Volume 5620, (2004) https://doi.org/10.1117/12.578075

KEYWORDS: Diffraction, Glasses, Cameras, Remote sensing, Wavefronts, Near field diffraction, Femtosecond phenomena, Prisms, Kerr effect, Refractive index

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Proceedings Article | 14 August 2001 Paper

Near-resonance nonlinearities in triazole-quinone derivatives

Raul Rangel-Rojo, L. Stranges, Ajoy Kar, M. Mendez-Rojas, W. Watson

Proceedings Volume 4419, (2001) https://doi.org/10.1117/12.437064

KEYWORDS: Absorption, Refractive index, Molecules, Data modeling, Saturable absorption, Switching, Signal detection, Laser optics, Transmittance, Sensors

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Proceedings Article | 1 February 2000 Paper

Polymer ablation by ultrashort pulsed lasers

Alexander Serafetinides, Mersini Makropoulou, Ajoy Kar, Constantine Skordoulis

Proceedings Volume 3885, (2000) https://doi.org/10.1117/12.376991

KEYWORDS: Polymers, Laser ablation, Pulsed laser operation, Atomic force microscopy, Picosecond phenomena, Etching, Femtosecond phenomena, Absorption, Visible radiation, Laser energy

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Proceedings Article | 29 April 1999 Paper

Ultrafast coherent spectroscopy in II-VI widegap semiconductors

Ajoy Kar, A. Tookey

Proceedings Volume 3729, (1999) https://doi.org/10.1117/12.346781

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Proceedings Article | 28 September 1998 Paper

GeS2-Ga2S3-CsI chalcohalide glasses for all-optical switching devices

Diego Marchese, Marco De Sario, Animesh Jha, Ajoy Kar, Euan Smith

Proceedings Volume 3416, (1998) https://doi.org/10.1117/12.323388

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Proceedings Article | 23 January 1997 Paper

Nonlinear refractive indices of polydiacetylene microcrystals

Hiro Matsuda, Shinji Yamada, Edward Van Keuren, Hideyuki Katagi, Hitoshi Kasai, Shuji Okada, Hidetoshi Oikawa, Hachiro Nakanishi, Euan Smith, Ajoy Kar, Brian Wherrett

Proceedings Volume 2998, (1997) https://doi.org/10.1117/12.264187

KEYWORDS: Absorption, Refractive index, Nonlinear optics, Water, Crystals, Polymers, Personal digital assistants, Excitons, Composites, Thin films

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Proceedings Article | 27 December 1996 Paper

Picosecond and subpicosecond laser ablation of polymers

Alexander Serafetinides, Constantine Skordoulis, Mersini Makropoulou, Ajoy Kar

Proceedings Volume 3052, (1996) https://doi.org/10.1117/12.262951

KEYWORDS: Laser ablation, Polymers, Picosecond phenomena, Laser energy, Pulsed laser operation, Femtosecond phenomena, Laser systems engineering, Absorption, Laser sources, Ultrafast phenomena

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Proceedings Article | 3 December 1996 Paper

Picosecond and femtosecond laser ablation of hard tissues

Alexander Serafetinides, Mersini Makropoulou, Ajoy Kar, Marouan Khabbaz

Proceedings Volume 2922, (1996) https://doi.org/10.1117/12.260660

KEYWORDS: Laser ablation, Tissues, Picosecond phenomena, Laser dentistry, Pulsed laser operation, Femtosecond phenomena, Absorption, Nd:YAG lasers, Teeth, Laser processing

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Proceedings Article | 16 December 1993 Paper

Characterization of the linear and nonlinear optical properties of polydiacetylenes

Tony Axon, David Bloor, S. Molyneux, Ajoy Kar, Brian Wherrett

Proceedings Volume 2025, (1993) https://doi.org/10.1117/12.165274

KEYWORDS: Personal digital assistants, Absorption, Polymers, Polymer thin films, Excitons, Refractive index, Silica, Picosecond phenomena, Crystals, Glasses

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Proceedings Article | 25 February 1993 Paper

Organic semiconductor-doped polymer glasses as novel nonlinear media

Graham Cross, M. Carroll, Tony Axon, David Bloor, Raul Rangel-Rojo, Ajoy Kar, Brian Wherrett

Proceedings Volume 1775, (1993) https://doi.org/10.1117/12.139226

KEYWORDS: Crystals, Heat treatments, Absorption, Polymers, Polymethylmethacrylate, Semiconductors, Glasses, Nonlinear crystals, Organic materials, Lithium

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Showing 5 of 36 publications

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