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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Cavity-QED-enhanced spontaneous and stimulated emission in liquid droplets

A. J. Campillo, Jay D. Eversole, Horn-Bond Lin

Published Oct 28, 1992• 1 citation
Publisher

Abstract

Several cavity quantum electrodynamic phenomena have been observed in liquid microdroplets. These include cavity-induced spectral changes, emission lifetime modification, and enhanced lasing and Raman gains.
DOI
10.1117/12.130393

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Cavity-QED-enhanced stimulated visible emission was observed in 14-\ensuremath{\mu}m-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. By equating stimulated gain to calculated/measured cavity losses, it was determined that spherical-cavity Q's of only 103−−{10}^{3--}103−−104{10}^{4}104 lead to cavity QED enhancements in excess of 120 in the emission cross section of rhodamine 6G, consistent with theory.