Abstract

High-$Q$ deformed silica microsphere cavities are fabricated by short ${\mathrm{CO}}_2$ 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.

© 2013 Optical Society of America

Directional escape from a high-Q deformed microsphere induced by short CO₂ laser pulses

Yun-Feng Xiao, Chun-Hua Dong, Zheng-Fu Han, Guang-Can Guo, and Young-Shin Park
Opt. Lett. 32(6) 644-646 (2007)

Directional emission from whispering-gallery modes in deformed fused-silica microspheres

Scott Lacey and Hailin Wang
Opt. Lett. 26(24) 1943-1945 (2001)

High quality factor silica microspheres functionalized with self-assembled nanomaterials

Ishac Kandas, Baigang Zhang, Chalongrat Daengngam, Islam Ashry, Chih-Yu Jao, Bo Peng, Sahin K. Ozdemir, Hans D. Robinson, James R. Heflin, Lan Yang, and Yong Xu
Opt. Express 21(18) 20601-20610 (2013)

Control of whispering-gallery-mode spectrum from erbium-doped silica microsphere lasers

Van Hoi Pham, Huy Bui, Thanh Son Pham, The Anh Nguyen, Thuy Van Nguyen, Huu Thang Le, Trung Ninh Bui, Van Phu Nguyen, and Roberto Coisson
J. Opt. Soc. Am. B 30(6) 1586-1589 (2013)

Theory of free space coupling to high-Q whispering gallery modes

Chang-Ling Zou, Fang-Jie Shu, Fang-Wen Sun, Zhao-Jun Gong, Zheng-Fu Han, and Guang-Can Guo
Opt. Express 21(8) 9982-9995 (2013)