Sub-micron diameter micropillar cavities with high Quality factors and ultra-small mode volumes

TL;DR

This paper theoretically demonstrates high-Q, ultra-small mode volume micropillar cavities using TiO2/SiO2, achieving record low mode volumes and enabling strong coupling cavity QED experiments with diamond nanocrystals.

Contribution

It introduces a novel design of micropillar cavities with record low mode volumes and high quality factors based on TiO2/SiO2, suitable for quantum electrodynamics applications.

Findings

Q/V ratio three orders of magnitude larger than previous reports

Feasible platform for cavity QED with diamond nanocrystals

Record low mode volumes with high quality factors

Abstract

We theoretically demonstrate high Quality factor micropillar cavities with record low mode volumes based on the TiO2/SiO2 material system. The proposed cavities have Q/V three orders of magnitude larger than previously reported ones. We show that our cavity embedded with diamond nanocrystal provides a feasible platform for cavity quantum electrodynamics experiments in the strong coupling limit.