Low refractive index contrast subwavelength gratings with high quality factor

Weronika Głowadzka; Tomasz Czyszanowski

doi:10.1117/12.2577677

5 March 2021 Low refractive index contrast subwavelength gratings with high quality factor

Proceedings Volume 11694, Photonic and Phononic Properties of Engineered Nanostructures XI; 1169412 (2021) https://doi.org/10.1117/12.2577677
Event: SPIE OPTO, 2021, Online Only

Abstract

Subwavelength one-dimensional gratings (SOGs) enable high quality factor (Q) Fano resonance, which yield significant advantages for integrated photonics applications. They are realized as high refractive index membranes suspended in air, or placed on low refractive index insulators. It was not yet analyzed whether it is possible to obtain high-Q in structures where refractive index contrast between membrane and cladding is smaller than 1. With the aid of numerical simulations we demonstrate high-Q resonance occurring for refractive index contrast between membrane and cladding as small as 0.5, allowing the realization of monolithically integrated semiconductor devices.

Conference Presentation

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Weronika Głowadzka and Tomasz Czyszanowski "Low refractive index contrast subwavelength gratings with high quality factor", Proc. SPIE 11694, Photonic and Phononic Properties of Engineered Nanostructures XI, 1169412 (5 March 2021); https://doi.org/10.1117/12.2577677

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