High-reflectivity, high-Q micromechanical membranes via guided resonances for enhanced optomechanical coupling
Optics
2015-05-30 v1 Quantum Physics
Abstract
Using Fano-type guided resonances (GRs) in photonic crystal (PhC) slab structures, we numerically and experimentally demonstrate optical reflectivity enhancement of high-Q SiNx membrane-type resonators used in membrane-in-the-middle optomechanical (OM) systems. Normal-incidence transmission and mechanical ringdown measurements of 50-nm-thick PhC membranes demonstrate GRs near 1064 nm, leading to a ~ 4\times increase in reflectivity while preserving high mechanical Q factors of up to ~ 5 \times 10^6. The results would allow improvement of membrane-in-the-middle OM systems by virtue of increased OM coupling, presenting a path towards ground state cooling of such a membrane and observations of related quantum effects.
Keywords
Cite
@article{arxiv.1110.3625,
title = {High-reflectivity, high-Q micromechanical membranes via guided resonances for enhanced optomechanical coupling},
author = {Catvu H. Bui and Jiangjun Zheng and S. W. Hoch and Lennon Y. T. Lee and J. G. E. Harris and Chee Wei Wong},
journal= {arXiv preprint arXiv:1110.3625},
year = {2015}
}