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17 March 2023 Inverted refractive-index-contrast grating mirror for microresonators
Daniel Jandura, Emilia Pruszynska-Karbownik, Maciej Dems, Jan Muszalski, Jan Suffczynski, Dusan Pudis, Tomasz G. Czyszanowski
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Proceedings Volume PC12430, Quantum Sensing and Nano Electronics and Photonics XIX; PC124301F (2023) https://doi.org/10.1117/12.2651164
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
We introduce an inverted refractive-index-contrast grating (ICG) that is a compact alternative to DBRs. In ICG a subwavelength grating made of a low refractive index material is implemented on a high refractive index cladding. We experimentally demonstrate high reflectivity of proof-of-concept ICG fabricated by 3D microprinting, in which IP-Dip photoresist grating is deposited on silicon cladding. We also show that the ICG provides nearly total optical power reflectance whenever the refractive index of the grating exceeds 1.75, irrespective of the refractive index of the cladding.
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Daniel Jandura, Emilia Pruszynska-Karbownik, Maciej Dems, Jan Muszalski, Jan Suffczynski, Dusan Pudis, and Tomasz G. Czyszanowski "Inverted refractive-index-contrast grating mirror for microresonators", Proc. SPIE PC12430, Quantum Sensing and Nano Electronics and Photonics XIX, PC124301F (17 March 2023); https://doi.org/10.1117/12.2651164
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KEYWORDS
Cladding
Mirrors
Refractive index
Reflectivity
Microresonators
Photoresist materials
Polarization
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