Highly reflective and high-Q thin resonant subwavelength gratings

TY - JOUR

T1 - Highly reflective and high-Q thin resonant subwavelength gratings

AU - singh, Gurpreet

AU - Mitra, Trishala

AU - Madsen, Søren Peder

AU - Dantan, Aurelien Romain

PY - 2024/10

Y1 - 2024/10

N2 - 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 a close to two orders of magnitude improvement (×90) in their transmission loss-linewidth product, which is the relevant figure of merit for e.g. resonant mirror-based microcavity applications.

AB - 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 a close to two orders of magnitude improvement (×90) in their transmission loss-linewidth product, which is the relevant figure of merit for e.g. resonant mirror-based microcavity applications.

KW - guided-mode resonance

KW - photonic crystal

KW - subwalength grating

KW - ultrathin mirrors

UR - http://www.scopus.com/inward/record.url?scp=85202433837&partnerID=8YFLogxK

U2 - 10.1088/2515-7647/ad70e7

DO - 10.1088/2515-7647/ad70e7

M3 - Journal article

SN - 2515-7647

VL - 6

JO - Journal of Physics: Photonics

JF - Journal of Physics: Photonics

IS - 4

M1 - 045009

ER -