Controlling deformation in a high quality factor silica microsphere toward single directional emission

Jin-Ming Cui; Chun-Hua Dong; Chang-Ling Zou; Fang-Wen Sun; Yun-Feng Xiao; Zheng-Fu Han; Guang-Can Guo

doi:10.1364/AO.52.000298

Controlling deformation in a high quality factor silica microsphere toward single directional emission

Appl Opt. 2013 Jan 10;52(2):298-301. doi: 10.1364/AO.52.000298.

Authors

Jin-Ming Cui¹, Chun-Hua Dong, Chang-Ling Zou, Fang-Wen Sun, Yun-Feng Xiao, Zheng-Fu Han, Guang-Can Guo

Affiliation

¹ Key Lab of Quantum Information, University of Science and Technology of China, Hefei 230026, Anhui, China.

PMID: 23314648
DOI: 10.1364/AO.52.000298

Abstract

High-Q deformed silica microsphere cavities are fabricated by short CO(2) laser pulses, where the deformation is well controlled by adjusting the intensity and number of pulses. Using this method, directional emission from whispering-gallery mode (WGM) with a high quality factor of 10(7) in these microspheres is achieved, and a transition from two-directional to single-directional emission is observed. Such concentrated directional emission and high-Q of WGMs show high potential for future studies of the chaotic ray dynamics in deformed microcavity and cavity quantum electrodynamics and optomechanics.