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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Patent
Electronically biased strip loaded waveguide
Lawrence C. Gunn,Axel Scherer +1 more
TL;DR: In this article, a strip loaded waveguide is proposed, where a guiding region is provided for propagating an optical mode and this guiding region extends both within the strip and the slab.
Journal ArticleDOI
Positive side of disorder: Statistical fluorene-carbazole-TTBTBTT terpolymers show improved optoelectronic and photovoltaic properties compared to the regioregular structures
Alexander V. Akkuratov,Sebastian Mühlbach,Sebastian Mühlbach,Diana K. Susarova,Martin Seßler,Birger Zimmermann,Vladimir F. Razumov,Uli Würfel,Uli Würfel,Pavel A. Troshin,Pavel A. Troshin +10 more
TL;DR: In this paper, a family of statistical fluorene-carbazole-TTBTBTT terpolymers with a variable carbazoleto-fluorene ratio was studied and power conversion efficiencies of 6.4-7.0% were obtained.
Journal ArticleDOI
Holographic recording of surface relief gratings in tolyle-based azobenzene oligomers
Andris Ozols,Andris Ozols,Māra Reinfelde,Dm. Saharov,K. Kundzins,Valdis Kampars,Valdis Kokars +6 more
TL;DR: In this article, the authors used a mean-field model and photodegradation of chromophores enabling the directional mass transport as the result of trans-cis transformations to record surface relief gratings.
Journal ArticleDOI
A tuneable, switchable dielectric grating
M.D. Bushbeck,Chi Hou Chan +1 more
TL;DR: In this article, the authors examined the dielectric scattering properties of dielectrics using the finite element method and showed that the critical bands can be shifted by changing the fluid pressure, at a cost of only slightly less than perfect passband transmission (97%).
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.