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
Unified design of sinusoidal-groove fused-silica grating
TL;DR: The performance of the sinusoidal grating is better than a conventional rectangular one, which could be useful for practical applications and could be used as the design guidelines for wavelength-independent structure from deep ultraviolet to far infrared.
Theory, Design, and Fabrication of Diffractive Grating Coupler for Slab Waveguide
TL;DR: In this paper, a diffractive grating coupler is proposed to record the interference between two waves in photoresist, and the diffraction gratings are fabricated by recording the interference.
Journal ArticleDOI
Redshifting and broadening of quantum-well infrared photodetector's response via impurity-free vacancy disordering
D. K. Sengupta,Vikram Jandhyala,Sangsig Kim,Weich Fang,J. I. Malin,P.J. Apostolakis,Kwong-Chi Hseih,Yia-Chung Chang,Shun Lien Chuang,Sumith V. Bandara,Sarath D. Gunapala,Milton Feng,Eric Michielssen,G. E. Stillman +13 more
TL;DR: In this paper, the authors have demonstrated redshifting and broadening of the wavelength responses of bound-to-continuum GaAs and InP-based quantum-well infrared photodetectors (QWIP's) after growth via impurity-free vacancy disordering (IFVD).
Journal ArticleDOI
Analysis of diffraction from echelette gratings, using a strip-current model
TL;DR: In this article, a method for analyzing electromagnetic scattering from an echelette grating separating two contrasting homogeneous media and illuminated by a plane wave is presented, in which sets of spatially periodic and properly modulated fictitious electric current strips are used to simulate the field scattered by the boundary surface and the field penetrated through the surface.
Journal ArticleDOI
Excitation of multiple surface-plasmon-polariton waves using a compound surface-relief grating
TL;DR: In this paper, the excitation of multisurface-plasmon-polariton (SPP) waves was investigated using a compound surface-relief grating formed by a metal and a rugate filter, both of finite thickness.
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.