Now showing items 1-10 of 26
Inverted polymer solar cells with amorphous indium zinc oxide as the electron-collecting electrode
(Georgia Institute of Technology, 2010-11)
We report on the fabrication and performance of polymer-based inverted solar cells utilizing amorphous indium zinc oxide (a-IZO) as the electron-collecting electrode. Amorphous IZO films of 200 nm thickness were deposited ...
Optimization of anisotropically etched silicon surface-relief gratings for substrate-mode optical interconnects
(Georgia Institute of Technology, 2006-01)
The optimum profiles of right-angle-face anisotropically etched silicon surface-relief gratings illuminated at normal incidence for substrate-mode optical interconnects are determined for TE, TM, and random linear (RL) ...
Prototype CO₂ laser-induced long-period fiber grating variable optical attenuators and optical tunable filters
(Georgia Institute of Technology, 2004-03)
Prototype devices capable of variable attenuation at a fixed wavelength, wavelength tuning at a constant attenuation, and combinations of these spectral characteristics are demonstrated in CO₂ laser-induced long-period ...
Optimization of sawtooth surface-relief gratings: effects of substrate refractive index and polarization
(Georgia Institute of Technology, 2006-05)
The effect of the refractive index of the substrate together with the incident polarization on the optimization of sawtooth surface-relief gratings (SRGs) is investigated. The global optimum diffraction efficiencies of the ...
Tuning of resonance-spacing in a traveling-wave resonator device
(Georgia Institute of Technology, 2010-04)
In this work a traveling-wave resonator device is proposed and experimentally demonstrated in silicon-on-insulator platform in which the spacing between its adjacent resonance modes can be tuned. This is achieved through ...
General methods for designing single-mode planar photonic crystal waveguides in hexagonal lattice structures
(Georgia Institute of Technology, 2003-06)
We systematically investigate and compare general methods of designing single mode photonic crystal waveguides in a two-dimensional hexagonal lattice of air holes in a dielectric material. We apply the rather general methods ...
Two-wave-plate compensator method for single-point retardation measurements
(Georgia Institute of Technology, 2004-12)
The two-wave-plate compensator (TWC) technique is introduced for single-point retardation measurements. The TWC method uses a known wave plate together with a wave plate of unknown retardation and produces a linearly ...
Quasi-free-space optical coupling between diffraction grating couplers fabricated on independent substrates
(Georgia Institute of Technology, 2004-10)
Optical coupling between preferential-order volume diffraction grating couplers fabricated on independent substrates is demonstrated. The coupling efficiency between gratings is quantified as a function of both grating and ...
Focus issue: Thin-film photovoltaic materials and devices introduction
(Georgia Institute of Technology, 2010-09)
Quantitative modeling of coupling-induced resonance frequency shift in microring resonators
(Georgia Institute of Technology, 2009-12)
We present a detailed study on the behavior of coupling-induced resonance frequency shift (CIFS) in dielectric microring resonators. CIFS is related to the phase responses of the coupling region of the resonator coupling ...