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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Journal ArticleDOI
Transmission of a Gaussian Beam Through AN Array of Dielectric Wedges.
TL;DR: In this article, an array of optically transparent dielectric wedges that has potential applications as a shield against high-energy cw laser beams is examined, and attenuation is achieved by the total reflection of the incident beam at the array surfaces.
Proceedings ArticleDOI
Nanophotonic devices based on near-field phenomena in periodic nanostructures
TL;DR: In this paper, the authors present a new modeling tool to analyze near-field phenomena in periodic nanostructures, and apply it to investigate nanophotonic devices, including 2-D photonic crystals with defects and a transverse near field localization structure for nonlinearity enhancement.
Proceedings ArticleDOI
Hollow Nano-Magnetic Resonators Mediated by Photo-Thermal Effects: Towards the Realization of Highly-Tunable Mid-Infrared Negative Permeability
TL;DR: Using a rigorous coupled-wave analysis combined with a thermo-optical sensitivity prediction scheme, the authors showed that nano-engineered magnetic resonators exhibit strong tunable magnetic response in mid-infrared, which can be effectively used for realizing negative magnetic permeability.
High-efficiency transmission gratings for unpolarized illumination: an intelligible analysis of the diffraction process
Abstract: For gaining a deeper understanding of the diffraction processes that take place in deep dielectric transmission gratings, a phenomenological explanation has been developed on the basis of a modal field, which propagates vertically through the grating region. The excitation of these modes by the incident wave, their propagation constants and how they couple to the diffraction orders determines the diffraction efficiency of the transmitted orders. The explicit modal analysis discloses the description of the highly efficient diffraction for polarized or unpolarized light by a very simple interference mechanism, which will be the subject of this paper.
Proceedings ArticleDOI
Design of two-dimensional grating for high precision precision machine tool measurement
TL;DR: In this article , the design of two-dimensional aluminum-plated and goldplated grating with periods of 1 micron and 2 microns, respectively, was carried out.
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.