Dr. David D. Smith Profile

Dr. David D. Smith

Research Scientist at NASA

SPIE Involvement:

Conference Program Committee | Author

Publications (9)

PROCEEDINGS ARTICLE | February 21, 2014

Fast-light enhancement by polarization mode coupling in a single optical cavity

Proc. SPIE. 8998, Advances in Slow and Fast Light VII

KEYWORDS: Signal to noise ratio, Superposition, Polarization, Dispersion, Reflectivity, Wave plates, Optical resonators, Liquid crystals, Computer aided design, Absorption

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PROCEEDINGS ARTICLE | March 6, 2013

Dispersion enhancement in atom-cavity and coupled cavity systems

Proc. SPIE. 8636, Advances in Slow and Fast Light VI

KEYWORDS: Mirrors, Dispersion, Reflectivity, Solids, Optical resonators, Transmittance, Laser optics, Resonance enhancement, Phase shifts, Absorption

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PROCEEDINGS ARTICLE | February 8, 2012

Tuning the sensitivity of an optical cavity with slow and fast light

Proc. SPIE. 8273, Advances in Slow and Fast Light V

KEYWORDS: Fabry–Perot interferometers, Slow light, Doppler effect, Dispersion, Optical resonators, Gyroscopes, Optical pumping, Laser beam diagnostics, Resonance enhancement, Absorption

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PROCEEDINGS ARTICLE | February 14, 2007

Dispersive elements for enhanced-laser gyroscopy and cavity stabilization

Proc. SPIE. 6452, Laser Resonators and Beam Control IX

KEYWORDS: Optical filters, Modulation, Resonators, Chemical species, Phase shift keying, Optical resonators, Gyroscopes, Chemical elements, Phase shifts, Absorption

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PROCEEDINGS ARTICLE | September 21, 2005

Coherence effects in ring laser gyros

Proc. SPIE. 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II

KEYWORDS: Slow light, Resonators, Scattering, Chemical species, Photons, Laser scattering, Laser resonators, Gyroscopes, Pulsed laser operation, Absorption

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PROCEEDINGS ARTICLE | April 4, 2005

Slow and fast light in coupled microresonators

Proc. SPIE. 5735, Advanced Optical and Quantum Memories and Computing II

KEYWORDS: Slow light, Transparency, Resonators, Waveguides, Dispersion, Optical resonators, Transmittance, Radio propagation, Phase shifts, Absorption

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PROCEEDINGS ARTICLE | October 25, 2002

Enhancement of optical nonlinearities via whispering gallery mode splitting

Proc. SPIE. 4813, Crystal Materials for Nonlinear Optical Devices and Microgravity Science

KEYWORDS: Surface plasmons, Optical spheres, Aerospace engineering, Resonators, Signal attenuation, Nonlinear optics, Terahertz radiation, Biological research, Iterative methods, Phase shifts

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PROCEEDINGS ARTICLE | June 28, 1999

Transmission measurements of the third-order susceptibility of gold

Proc. SPIE. 3793, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials

KEYWORDS: Gold, Thin films, Refractive index, Nanoparticles, Metals, Composites, Dielectrics, Nonlinear optics, Phase shifts, Absorption

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PROCEEDINGS ARTICLE | August 25, 1998

Photonic and opto-electronic applications of polydiacetylene films photodeposited from solution and polydiacetylene copolymer networks

Proc. SPIE. 3388, Advances in Optical Information Processing VIII

KEYWORDS: Optical fibers, Holography, Switching, Polymers, Ultraviolet radiation, Particles, Personal digital assistants, Nonlinear optics, Convection, Absorption

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Polydiacetylenes (PDAs) are attractive materials for both electronic and photonic applications because of their highly conjugated electronic structures. They have been investigated for applications as both 1D conductors and nonlinear optical (NLO) materials. One of the chief limitations to the use of PDAs has been the inability to readily process them into useful forms such as films and fibers. In our laboratory we have developed a novel process for obtaining amorphous films of a PDA derived from 2- methyl-4-nitroaniline using photodeposition with UV light from monomer solutions onto transparent substrates. Photodeposition from solution provides a simple technique for obtaining PDA films in any desired pattern with good optical quality. This technique has been used to produce PDA films that show potential for optical applications such as holographic memory storage and optical limiting, as well as third-order NLO applications such as all-optical refractive index modulation, phase modulation and switching. Additionally, copolymerization of diacetylenes with other monomers such as methacrylates provides a means to obtain materials with good processibility. Such copolymers can be spin cast to form films, or drawn by either melt or solution extrusion into fibers. These films or fibers can then be irradiated with UV to photopolymerize the diacetylene units to form a highly stable cross-linked PDA-copolymer network. If such films are electrically poled while being irradiated, they can achieve the asymmetry necessary for second-order NLO applications such as electro-optic switching. On Earth, formation of PDAs by the above mentioned techniques suffers from defects and inhomogeneities caused by convective flows that can arise during processing. By studying the formation of these materials in the reduced-convection, diffusion- controlled environment of space we hope to better understand the factors that affect their processing, and thereby, their nature and properties. Ultimately it may even be feasibly to conduct space processing of PDAs for technological applications.

Showing 5 of 9 publications

Conference Committee Involvement (8)

Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology

2 February 2019 | San Francisco, California, United States

Steep Dispersion Engineering and Opto-Atomic Precision Metrology XI

29 January 2018 | San Francisco, California, United States

Slow Light, Fast Light, and Opto-Atomic Precision Metrology X

30 January 2017 | San Francisco, California, United States

Slow Light, Fast Light, and Opto-Atomic Precision Metrology IX

15 February 2016 | San Francisco, California, United States

Slow Light, Fast Light, and Opto-Atomic Precision Metrology VIII

8 February 2015 | San Francisco, California, United States

Showing 5 of 8 published special sections

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