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Published April 10, 2008 | Version Published
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Directly mapping whispering gallery modes in a microsphere through modal coupling and directional emission

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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.

Additional Information

© 2008 Chinese Optics Letters. Received October 9, 2007. 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).

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Identifiers

Eprint ID
16048
Resolver ID
CaltechAUTHORS:20090925-084328435

Funding

National Fundamental Research Program of China
2006CB921900
Chinese Academy of Sciences
National Natural Science Foundation of China
60537020
National Natural Science Foundation of China
60621064

Dates

Created
2009-09-28
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Updated
2019-10-03
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