Prof. Timothy J. White Profile

Prof. Timothy J. White

Gallogly Professor at Univ of Colorado Boulder

SPIE Involvement:

Conference Program Committee | Author

Publications (25)

Proceedings Article | 30 September 2024 Presentation

Electrically tunable spectral filters

Timothy White

Proceedings Volume PC13121, PC1312101 (2024) https://doi.org/10.1117/12.3025317

KEYWORDS: Optical filters, Liquid crystals, Tunable filters, Switching, Short wave infrared radiation, Reflection, Near infrared, Mid-IR, Liquids, Electromagnetism

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Proceedings Article | 13 March 2024 Presentation

Recent work in color changing polymer stabilized cholesteric liquid crystals in response to e-fields

Michael McConney, Brian Radka, Kyung Min Lee, Nicholas Godman, Timothy White, Timothy Bunning

Proceedings Volume PC12907, PC1290703 (2024) https://doi.org/10.1117/12.3003147

KEYWORDS: Liquid crystals, Polymers, Color, Mixtures, Deformation, Photopolymerization, Molecular self-assembly, Holography, Electric fields, Doping

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Proceedings Article | 5 October 2023 Presentation

Molecular engineering of polymer stabilizing network to enhance the electro-optic response of polymer-stabilized cholesteric liquid crystals

Gaurav Pande, Brian Radka, Timothy White

Proceedings Volume PC12658, PC126580D (2023) https://doi.org/10.1117/12.2682110

KEYWORDS: Electro optic polymers, Polymers, Liquid crystals, Electro optics, Engineering, Ions, LCDs, Transition metals, Sodium, Reflection

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Proceedings Article | 14 March 2023 Presentation

Dynamic ion assisted optical changes in polymer stabilized cholesteric liquid crystals (Conference Presentation)

Brian Radka, Gaurav Pande, Timothy White

Proceedings Volume PC12442, PC1244208 (2023) https://doi.org/10.1117/12.2649141

KEYWORDS: Polymers, Liquid crystals, Ions, Optical properties, Switching, Liquids, LCDs, Crystals

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Proceedings Article | 14 March 2023 Presentation

Electrically tunable, fully solid, reflective optical elements (Conference Presentation)

Alexis Phillips, Kyle Schlafmann, Hayden Fowler, Timothy White

Proceedings Volume PC12442, PC1244207 (2023) https://doi.org/10.1117/12.2650831

KEYWORDS: Solids, Reflectivity, Optical components, Electro optics, Tunable filters, Thermography, Skin, Robotics, Refractive index, Photonic crystals

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Proceedings Article | 3 August 2021 Presentation

Tunable reflective colors in holographically patterned liquid crystal gels

Kyung Min Lee, Timothy Bunning, Timothy White, Michael McConney, Nicholas Godman

Proceedings Volume 11807, 1180705 (2021) https://doi.org/10.1117/12.2593997

KEYWORDS: Polymers, Liquid crystals, Holography, Reflectivity, Photorefractive polymers, Refractive index, Reflection, Thin films, Switching, Photonic crystals

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Proceedings Article | 3 August 2021 Presentation

Dynamic optical filters via mechanical reconfiguration of liquid crystalline materials

Timothy White

Proceedings Volume 11807, 118070Y (2021) https://doi.org/10.1117/12.2595064

KEYWORDS: Solids, Polymers, Liquids, Liquid crystals, Crystals, Chemistry, Chemical elements

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Proceedings Article | 1 August 2021 Presentation

Exploring the electro-optic response of stabilized cholesteric liquid crystals containing a non-liquid crystalline polymer network

Brian Radka, Timothy White

Proceedings Volume 11807, 118070H (2021) https://doi.org/10.1117/12.2594769

KEYWORDS: Liquid crystals, Electro optics, Crystals, Polymers, Electro optic polymers, Liquids, Reflection

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Proceedings Article | 5 March 2021 Presentation

Electro-optic response in polymer stabilized cholesteric liquid crystals

Kyung Min Lee, Timothy White, Timothy Bunning, Michael McConney, Nicholas Godman

Proceedings Volume 11707, 117070J (2021) https://doi.org/10.1117/12.2578297

KEYWORDS: Electro optic polymers, Polymers, Liquid crystals, Electro optics, Diffraction, Photonic crystals, Scattering, Optical components, Laser scattering, LCDs

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Proceedings Article | 20 August 2020 Poster

Eﬀect of cell thickness on the electro-optic response of polymer stabilized cholesteric liquid crystals with negative dielectric anisotropy

Kyung Min Lee, Ecklin Crenshaw, Mariacristina Rumi, Timothy White, Timothy Bunning, Michael McConney

Proceedings Volume 11472, 1147217 (2020) https://doi.org/10.1117/12.2568117

KEYWORDS: Electro optic polymers, Polymers, Electro optics, Liquid crystals, Dielectrics, Anisotropy, Electroluminescent displays, Photonic crystals, Modulation, Fast packet switching

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Proceedings Article | 20 August 2020 Presentation

Electro-optic response in holographic polymer stabilized cholesteric liquid crystals

Kyung Min Lee, Vincent Tondiglia, Timothy White, Timothy Bunning, Michael McConney

Proceedings Volume 11472, 1147208 (2020) https://doi.org/10.1117/12.2568108

KEYWORDS: Polymers, Liquid crystals, Holography, Electro optics, Electro optic polymers, Diffraction, Photonic crystals, Diffraction gratings, Optical components, LCDs

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Proceedings Article | 20 August 2020 Presentation

Electrochromism in liquid crystals: dynamic control of reflection wavelength and bandwidth

Timothy White, Brian Radka

Proceedings Volume 11472, 1147205 (2020) https://doi.org/10.1117/12.2566977

KEYWORDS: Liquid crystals, Polymers, Aerospace engineering, Absorption, Liquids, Crystals, Electro optics, Electro optic polymers, Chemistry, Polymerization

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Proceedings Article | 9 March 2020 Presentation

Electrically-tunable holographic polymer stabilized liquid-crystal reflection gratings (Conference Presentation)

Kyung Min Lee, Vincent Tondiglia, Timothy White, Timothy Bunning, Michael McConney

Proceedings Volume 11303, 113030R (2020) https://doi.org/10.1117/12.2544263

KEYWORDS: Polymers, Holography, Liquid crystals, Switching, Prisms, Temperature metrology, Refractive index, Photorefractive polymers, Liquids, Crystals

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Proceedings Article | 4 March 2019 Presentation

Tunable holographic gratings based on cross-linked liquid-crystalline polymers in nematic liquid crystals (Conference Presentation)

Kyung Min Lee, Vincent Tondiglia, Timothy Bunning, Timothy White, Michael McConney

Proceedings Volume 10944, 1094406 (2019) https://doi.org/10.1117/12.2510438

KEYWORDS: Liquid crystals, Holography, Polymers, Dielectric polarization, Diffraction gratings, Photopolymerization, Liquids, Diffraction, Dielectrics, Anisotropy

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Proceedings Article | 4 March 2019 Presentation

Dynamic electro-optic responses of holographically patterned polymer stabilized cholesteric liquid crystals (Conference Presentation)

Kyung Min Lee, Vincent Tondiglia, Timothy White, Timothy Bunning, Michael McConney

Proceedings Volume 10944, 1094404 (2019) https://doi.org/10.1117/12.2507475

KEYWORDS: Liquid crystals, Holography, Polymers, Electro optics, Electro optic polymers, Ultraviolet radiation, Laser stabilization, Prisms, Dielectrics, Anisotropy

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Proceedings Article | 22 March 2018 Presentation + Paper

The effects of surface topography control using liquid crystal elastomers on bodies in flow

Michael Settle, Tyler Guin, Richard Beblo, Timothy White, Gregory Reich

Proceedings Volume 10596, 105961J (2018) https://doi.org/10.1117/12.2295915

KEYWORDS: Digital image correlation, Liquid crystals, 3D modeling, Protactinium, Statistical modeling, Control systems, Cameras, Aluminum, Temperature metrology, Analytical research

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Proceedings Article | 21 April 2017 Presentation

Time-dependent deformation of polymer network in polymer-stabilized cholesteric liquid crystals (Conference Presentation)

Kyung Min Lee, Vincent Tondiglia, Timothy Bunning, Timothy White

Proceedings Volume 10125, 1012517 (2017) https://doi.org/10.1117/12.2250581

KEYWORDS: Polymers, Liquid crystals, Electro optic polymers, Electrodes, Electro optics, Ions, Electro optical modeling, Dielectrics, Anisotropy, Photopolymerization

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Proceedings Article | 2 November 2016 Open Access

Integrating 4G Optics (Conference Presentation)

Nelson Tabiryan, Jeoungyeon Hwang, Diane Steeves, Brian Kimball, Timothy Bunning, Timothy White

Proceedings Volume 9940, 994018 (2016) https://doi.org/10.1117/12.2238955

KEYWORDS: Liquid crystals, Polymers, Electro optics, Integrated optics, Photonic devices, Electro optic polymers, Multilayers, Polymer thin films, Solids, Graphene

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Proceedings Article | 2 November 2016 Presentation

Bandgap tuning induced by polymer deformation in PSCLCs with positive dielectric anisotropies (Conference Presentation)

Vincent Tondiglia, Kyung Min Lee, Timothy White

Proceedings Volume 9940, 99400P (2016) https://doi.org/10.1117/12.2237744

KEYWORDS: Polymers, Liquid crystals, Dielectrics, Anisotropy, Electrodes, Switching, Electro optics, Networks, Complex systems, Optical filters

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Proceedings Article | 9 March 2014 Paper

Designing light responsive bistable arches for rapid, remotely triggered actuation

Matthew Smith, M. Ravi Shankar, Ryan Backman, Vincent Tondiglia, Kyung Min Lee, Michael McConney, David Wang, Loon-Seng Tan, Timothy White

Proceedings Volume 9058, 90580F (2014) https://doi.org/10.1117/12.2044906

KEYWORDS: Polymers, Actuators, Polymeric actuators, Polarization, Venus, Mechanics, Motion models, Electroluminescent displays, Binary data, Optical switching

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Proceedings Article | 12 September 2013 Paper

Effects of in-plane electric fields on the optical properties of cholesteric liquid crystals

Mariacristina Rumi, Vincent Tondiglia, Lalgudi Natarajan, Timothy White, Timothy Bunning

Proceedings Volume 8828, 882817 (2013) https://doi.org/10.1117/12.2023282

KEYWORDS: Electrodes, Reflectivity, Liquid crystals, Transmittance, Polarizers, Dielectrics, Anisotropy, Refractive index, Birefringence, Optical properties

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Proceedings Article | 28 March 2012 Paper

Optimizing the photomechanical performance of glassy azobenzene liquid crystal polymer networks

Liang Cheng, Kyung Min Lee, Amber McClung, Jeffery Baur, Timothy White, William Oates

Proceedings Volume 8342, 83420C (2012) https://doi.org/10.1117/12.917482

KEYWORDS: Polymers, Reflection, Liquid crystals, Absorption, Polarization, Data modeling, Signal attenuation, Chromophores, Polymer thin films, 3D modeling

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Proceedings Article | 2 February 2011 Paper

Liquid crystal Bragg filters

Richard Sutherland, Lalgudi Natarajan, Vincent Tondiglia, Christopher Bailey, Madeline Duning, Anastasia Voevodin, Timothy White, Timothy Bunning

Proceedings Volume 7955, 79550S (2011) https://doi.org/10.1117/12.878500

KEYWORDS: Liquid crystals, Optical filters, Modulation, Dielectrics, Polymers, Birefringence, Diffraction, Tunable filters, Switching, Fiber Bragg gratings

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Proceedings Article | 18 August 2010 Paper

Non-symmetric broadening of the reflection notch in polymer stabilized cholesteric liquid crystals

Lalgudi Natarajan, Jimmy Voss, Vincent Tondiglia, Deng-Ke Yang, Timothy White, Timothy Bunning

Proceedings Volume 7775, 77750Z (2010) https://doi.org/10.1117/12.861367

KEYWORDS: Ultraviolet radiation, Liquid crystals, Polymerization, Polymers, Diffusion, Lamps, Absorption, Reflection, Light sources, Ultraviolet sources

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Proceedings Article | 12 September 2007 Paper

Polarization dependent photoactuation in azobenzene LC polymers

Timothy White, J. Koval, V. Tondiglia, L. Natarajan, R. Vaia, S. Serak, V. Grozhik, N. Tabirian, Timothy Bunning

Proceedings Volume 6654, 665403 (2007) https://doi.org/10.1117/12.734670

KEYWORDS: Polymers, Liquid crystals, Polarization, Liquids, Holography, Crystals, Helium cadmium lasers, Photopolymerization, Ultraviolet radiation, Absorbance

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