Chinese Optics Letters, Vol. 17, Issue 12, 121401 (2019)
Direct single-mode lasing in polymer microbottle resonators through surface destruction
Saima Ubaid, Feng Liao, Tao Guo, Zhaoqi Gu, Shuangyi Linghu, Yanna Ma, Jiaxin Yu, and Fuxing Gu*
- Laboratory of Integrated Opto-Mechanics and Electronics, Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System (Ministry of Education), University of Shanghai for Science and Technology, Shanghai 200093, China
We demonstrate an effective approach of mode suppression by simply using a tungsten probe to destroy the external neck surface of polymer microbottle resonators. The higher-order bottle modes with large axial orders, spatially located around the neck surface of the microresonator, will suffer large optical losses. Thus, excitation just with an ordinary free-space light beam will ensure direct generation of single fundamental bottle mode lasers. This method is with very low cost and convenient and can obtain high side-mode suppression factors. Our work demonstrated here may have promising applications such as in lasing and sensing devices.