IEEE Photonics Journal, ( ISI ), Volume (7), No (5), Year (2015-10) , Pages (49002101-490021011)

Title : ( Modal processes in 2D resonant reflectors and their correlation with spectra of 1D equivalents )

Authors: Yeong Hwan Ko , Mehrdad Shokooh-Saremi , Robert Magnusson ,

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Abstract

We explain modal processes in 2-D guided-mode resonance reflectors with subwavelength periods in terms of the mode structure of quasi-equivalent 1-D gratingbased reflectors. The 1-D gratings are designed via a second-order effective-medium theory. The principal features in the reflection spectra of the 2-D devices show good quantitative agreement with the corresponding 1-D grating spectra for small modulation strength. Thereby, clear connections are established with the TE and TM modal states of a reflector. For reflectors made with silicon that has a high index of refraction, there is qualitative agreement between the 2-D spectra and the concomitant 1-D modal signatures. Two-dimensional reflectors with periodic rods and holes are treated. In both cases, it is found that the spectra are dominated by contributions from a single polarization state in the 1-D grating equivalent. The results and methods provided herein enable improved understanding of the physical properties of 2-D resonant reflectors and the related 2-D modulated devices, including photonic crystal slabs. Hence, this methodology facilitates the design of 2-D reflectors in general as is straightforwardly applied to device architectures, materials, and spectral regions beyond those treated here.

Keywords

, Engineered photonic nanostructures, subwavelength structures, diffractive optics, nanophotonics, guided-mode resonance (GMR), effective-medium theory.
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@article{paperid:1049878,
author = {Yeong Hwan Ko and Shokooh-Saremi, Mehrdad and Robert Magnusson},
title = {Modal processes in 2D resonant reflectors and their correlation with spectra of 1D equivalents},
journal = {IEEE Photonics Journal},
year = {2015},
volume = {7},
number = {5},
month = {October},
issn = {1943-0655},
pages = {49002101--490021011},
numpages = {441018910},
keywords = {Engineered photonic nanostructures; subwavelength structures; diffractive optics; nanophotonics; guided-mode resonance (GMR); effective-medium theory.},
}

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%0 Journal Article
%T Modal processes in 2D resonant reflectors and their correlation with spectra of 1D equivalents
%A Yeong Hwan Ko
%A Shokooh-Saremi, Mehrdad
%A Robert Magnusson
%J IEEE Photonics Journal
%@ 1943-0655
%D 2015

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