Cavity quantum electrodynamic enhancement of stimulated emission in microdroplets.

Cavity-QED-enhanced stimulated visible emission was observed in 14-μm-diam rhodamine-6G-ethanol droplets pumped by cw 514.5-nm radiation. Use of droplets provides an excellent test of cavity QED theory for spherical geometries. The mode number and order of the spherical-cavity resonances responsible for the observed emission peaks were identified and their Q values calculated from Lorenz-Mie theory