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

作者：Dong Chunhua^*; Xiao Yunfeng; Yong Yang; Han Zhengfu; Guo Guangcan; Lan Yang

来源：Chinese Optics Letters, 2008, 6(4): 300-302.

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.

• 出版日期2008-4-10
• 单位中国科学技术大学