Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission

Chunhua Dong; Yunfeng Xiao; Yong Yang; Zhengfu Han; Guangcan Guo; Lan Yang

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Chinese Optics Letters
Vol. 6,
Issue 4,
pp. 300-302
(2008)

Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission

Chunhua Dong, Yunfeng Xiao, Yong Yang, Zhengfu Han, Guangcan Guo, and Lan Yang

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Chunhua Dong, Yunfeng Xiao, Yong Yang, Zhengfu Han, Guangcan Guo University of Science and Technology of China

Lan Yang California Institute of Technology

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C Dong
Y Xiao
Y Yang
Z Han
G Guo
L Yang

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Chunhua Dong, Yunfeng Xiao, Yong Yang, Zhengfu Han, Guangcan Guo, and Lan Yang, "Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission," Chin. Opt. Lett. 6, 300-302 (2008)

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Abstract

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Abstract

We fabricate slightly deformed fused-silica microspheres in which whispering gallery modes possess remarkably directional escape emission from the microsphere boundary. With efficient free-space excitation and collection, the lateral spatial distribution of whispering gallery modes with different azimuthal mode numbers, m, is directly observed through modal coupling and directional emission. Excellent agreement with theory is obtained.

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