Journal ArticleDOI
Diffraction analysis of dielectric surface-relief gratings
M. G. Moharam,Thomas K. Gaylord +1 more
TLDR
In this article, a dielectric surface-relief grating is analyzed using rigorous coupled-wave theory and the analysis applies to arbitrary grating profiles, groove depths, angles of incidence, and wavelengths.Abstract:
Diffraction by a dielectric surface-relief grating is analyzed using rigorous coupled-wave theory. The analysis applies to arbitrary grating profiles, groove depths, angles of incidence, and wavelengths. Example results for a wide range of groove depths are presented for sinusoidal, square-wave, triangular, and sawtooth gratings. Diffraction efficiencies obtained from the present method of analysis are compared with previously published numerical results. To obtain large diffraction efficiencies (greater than 85%) for gratings with typical substrate permittivities, it is shown that the grating profile should possess even symmetry.read more
Citations
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Numerical treatment of localized fields in rigorous diffraction theory and its application to light absorption in structured layers
TL;DR: The results are used to develop a photodetector that is fully compatible with the SOI-CMOS process and does not depend on typical optically active III-V materials, which enables the direct integration of an active, optical component in the manufacturing process of conventional electronic chips and might allow the development of new cost-effective optoelectronic hybrid components in the future.
Proceedings ArticleDOI
Nanofabricated Infrared Polarization and Color Filters for Cloud Thermodynamic Phase Determination
Andrew J. Hohne,Benjamin Moon,Carol L. Baumbauer,Tristan Gray,Martin Jan Tauc,James Dilts,David L. Dickensheets,Joseph A. Shaw,Wataru Nakagawa +8 more
TL;DR: Polarization and wavelength filters for the shortwave infrared based on metal-coated subwavelength period silicon gratings are designed and fabricated in this article, which enables the realization of the desired polarization and wavelength selectivity for each filter element while also facilitating the integration of these elements into an array with varying polarizer orientation and passband center wavelength.
Journal ArticleDOI
Coordinate transformation formulation of electromagnetic scattering from imperfectly periodic surfaces
TL;DR: The pseudo- Periodic Fourier transform is introduced to convert the fields in imperfectly periodic structures to pseudo-periodic ones, and the C-method becomes then applicable.
Journal ArticleDOI
Design and simulation of resonant cavity enhanced corrugated quantum well infrared photodetectors
Jang Pyo Kim,Andrew Sarangan +1 more
TL;DR: This work considers what is believed to be a novel design that utilizes a resonant cavity enhancement technique to increase the efficiency beyond 50% by rotating the photon polarization at each pass around the cavity.
Journal ArticleDOI
Single Grain Boundary Modeling and Design of Microcrystalline Si Solar Cells
TL;DR: High-efficiency and low-cost Si-based thin film solar cells can now be designed based on the information provided in this paper, and the three-terminal structure increased the JSC but decreased the VOC.
References
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Journal ArticleDOI
Rigorous coupled-wave analysis of planar-grating diffraction
M. G. Moharam,Thomas K. Gaylord +1 more
TL;DR: In this article, a rigorous coupled-wave approach is used to analyze diffraction by general planar gratings bounded by two different media, and the analysis is based on a state-variables representation and results in a unifying, easily computer-implementable matrix formulation.
Journal ArticleDOI
Theory of Periodic Dielect Waveguides
TL;DR: In this paper, the propagation of electromagnetic waves along open periodic, dielectric waveguides is formulated as a rigorous and exact boundary-value problem, and the characteristic field solutions are shown to be of the surface-wave or leaky-wave type, depending on the ratio of periodicity to wavelength (d/lambda).
Journal ArticleDOI
Analysis and Design of Grating Couplers
Theodor Tamir,S. T. Peng +1 more
TL;DR: In this paper, simple design criteria for grating couplers which transfer the energy of a beam into or out of an optical waveguide are developed based on an accurate perturbation analysis of the guiding properties of dielectric gratings.
Journal ArticleDOI
Rigorous diffraction theory for transmission phase gratings with deep rectangular grooves
TL;DR: In this article, the diffraction of light by deep rectangular-groove transmission phase gratings is treated by solving Maxwell's equations numerically, and results are given for the light diffracted into the zero order by gratings with grating constants d in the range λ < d < 5λ, aspect ratio b (= linewidth/d), 0 < b < 1, and grating depths a < 5 λ, assuming a refractive index n 0 = 1.
Journal ArticleDOI
Analysis of grating-coupled radiation in GaAs:GaAlAs lasers and waveguides - I
TL;DR: In this paper, a general formulation for arbitrary-shaped gratings which need not be small in size was developed for radiated power from traveling waves as a function of grating tooth height, tooth width, refractive index, waveguide thickness, and period.