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Chin. Opt. Lett.
 Home  List of Issues    Issue 04 , Vol. 06 , 2008    Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission

Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission
Chunhua Dong1, Yunfeng Xiao1, Yong Yang1, Zhengfu Han1, Guangcan Guo1, Lan Yang2
1 Key Laboratory of Quantum Information, [University of Science and Technology of China], Hefei 230026
2 Department of Applied Physics, [California Institute of Technology], Pasadena, California 91125, USA

Chin. Opt. Lett., 2008, 06(04): pp.300-302-3

Topic:Lasers and laser optics
Keywords(OCIS Code): 140.3410  230.5750  350.3950  

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.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Get Citation: Chunhua Dong, Yunfeng Xiao, Yong Yang, Zhengfu Han, Guangcan Guo, Lan Yang, "Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission," Chin. Opt. Lett. 06(04), 300-302-3(2008)

Note: Y. Xiao gratefully thank Professor Kerry J. Vahala at Caltech for his numerous amendments and valuable suggestions to the current paper. C. Dong and Y. Xiao contribute equally to this paper. This work was supported by the National Fundamental Research Program of China (No.2006CB921900), the Knowledge Innovation Project of Chinese Academy of Sciences, and the National Natural Science Foundation of China (No.60537020 and 60621064). C. Dong's e-mail address is Dfrank.dch@gmail.com.


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