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5 March 2021 Inverted high-contrast gratings
Emilia Pruszynska-Karbownik, Lukasz Zinkiewicz, Jan Suffczynski, Tomasz G. Czyszanowski
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Proceedings Volume 11695, High Contrast Metastructures X; 116951R (2021) https://doi.org/10.1117/12.2578764
Event: SPIE OPTO, 2021, Online Only
Abstract
We propose a grating that design is inverted with respect to a design of conventional high-contrast grating (HCG) in which low refractive index grating is implemented on high refractive index cladding. We show that inverted HCG can achieve power reflectance of nearly 100% even if the refractive index of the grating is as low as 1.8. Inverted HCG facilitates implementation of highly reflecting mirrors composed of etched SiN, HfO or 3D micro-printed IP-Dip on semiconductors such as GaAs that processing is less technologically demanding with respect to processing of HCGs or monolithic HCGs.
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Emilia Pruszynska-Karbownik, Lukasz Zinkiewicz, Jan Suffczynski, and Tomasz G. Czyszanowski "Inverted high-contrast gratings", Proc. SPIE 11695, High Contrast Metastructures X, 116951R (5 March 2021); https://doi.org/10.1117/12.2578764
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KEYWORDS
Refractive index
Cladding
Optical design
Reflectivity
Mirrors
Numerical analysis
Optical microcavities
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