Optical microcavity with a pair of suspended resonant mirrors

TL;DR

This paper presents the design, modeling, and experimental realization of an optical microcavity with two suspended resonant mirrors, demonstrating its spectral properties and potential for advanced photonic applications.

Contribution

It introduces a novel microcavity with paired suspended resonant mirrors and provides both theoretical analysis and experimental validation.

Findings

Spectral transmission spectra match Fabry-Perot model predictions

High-quality resonances observed in the microcavity

Successful fabrication using ultrathin silicon nitride films

Abstract

We report on the realization of an optical microcavity consisting in the plane-plane arrangement of two suspended resonant mirrors possessing spectrally overlapping high-quality factor internal resonances. We first investigate its generic transmission spectra as the cavity length is varied on the basis of a simple linear Fabry-Perot model, compare them with those of broadband mirror cavities or Fano cavities possessing a single resoannt mirror, and then present an experimental realization using a pair of highly pretensioned, ultrathin silicon nitride films patterned with one-dimensional photonic crystal structures.