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High efficiency two-dimensional grating reflectors with angularly tunable polarization efficiency
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DOI：10.1063/1.4802883.png)
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Abstract
En 中文
We report on two-dimensional high-contrast subwavelength gratings with a polarization efficiency that is tunable in the angular spectrum. Due to the high index contrast it is possible to realize highly efficient reflectors with nearly angular independent reflection for light with transverse-electric polarization. Simultaneously, for transverse-magnetic polarized light the minimum and maximum reflectance can be tuned to a defined angle of incidence. Configurations with minimized and maximized polarization efficiencies at incidence angles of 0 degrees and 45 degrees are exemplified for a design wavelength of 1550 nm. For the case of minimum polarization efficiency we present the experimental results for a non-monolithic and a monolithic realization. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4802883]
Keywords:
WAVE-GUIDE GRATINGS
PERIODIC STRUCTURES
SILICON
FILTERS
FABRICATION
CAVITY
BEAM
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