Cavities with nonspherical mirrors for enhanced interaction between a quantum emitter and cavity photons

We propose a procedure for the significant enhancement of strong-coupling rate between photons in an optical cavity and single quantum emitter, such as atom, dot, or trapped ion. show that specially designed, nonspherical mirrors can lead to eigenmodes exhibit large field at center while inducing significantly less beam divergence therefore smaller round trip losses higher cooperativity than be achieved by operating spherical-mirror near-concentric regime. verify our designs using mode matching theory discuss their robustness relative different kinds manufacturing deviations.