Highly reflective and high-Q thin resonant subwavelength gratings

2024/04/09 by Gurpreet Singh, Singh, Gurpreet, Trishala Mitra +5 · 1 citation
Engineering · Materials Science · #Advanced Fiber Optic Sensors #FOS: Physical sciences #Optical Coatings and Gratings #Optics (physics.optics) #Photonic and Optical Devices

paper · pdf · doi:10.48550/arxiv.2404.06143

openalex publication_date 2024/04/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We theoretically investigate the design of thin subwavelength gratings possessing high-reflectivity and high-Q resonances when illuminated at normal incidence by a Gaussian beam. We compare the performances of single-period and dual-period rectangular gratings using Finite Element Method-based optimization and predict one to two orders of magnitude improvement in their transmission loss-linewidth product, which is the relevant figure of merit for e.g. resonant mirror-based microcavity applications.

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• Optical microcavity with a pair of suspended resonant mirrors

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