Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing.

ABSTRACT: Highly reflective mirrors are indispensable components in a variety of state-of-the-art photonic devices. Typically used, bulky, multi-layered distributed Bragg (DBR) reflectors are limited to lattice-matched semiconductors or nonconductive dielectrics. Here, we introduce an inverted refractive index-contrast grating (ICG) as compact, single-layer alternative to DBR. In the ICG, a subwavelength one-dimensional grating made of a low-refractive-index material is implemented on a high-refractive-index cladding. Our numerical simulations show that the ICG provides nearly total optical power reflectance for the light incident from the side of the cladding whenever the refractive index of the grating exceeds 1.75, irrespective of the refractive index of the cladding. Additionally, the ICG enable

SUBMITTER: Pruszynska-Karbownik E 

PROVIDER: S-EPMC11501227 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature