Photonics Research, 2017, 5 (2): 02000073, Published Online: Sep. 26, 2018  

Demonstration of an ultra-low-threshold phonon laser with coupled microtoroid resonators in vacuum Download: 834次

Author Affiliations
1 National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
2 Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, China
3 Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
Abstract
We demonstrate an ultra-low-threshold phonon laser using a coupled-microtoroid-cavity system by introducing a novel coupling approach. The scheme exhibits both high optical quality factors and high mechanical quality factors. We have experimentally obtained the mechanical quality factor up to 18,000 in vacuum for a radial-breathing mode of 59.2 MHz. The measured phonon lasing threshold is as low as 1.2 μW, which is 5 times lower than the previous result.

Guanzhong Wang, Mingming Zhao, Yingchun Qin, Zhangqi Yin, Xiaoshun Jiang, Min Xiao. Demonstration of an ultra-low-threshold phonon laser with coupled microtoroid resonators in vacuum[J]. Photonics Research, 2017, 5(2): 02000073.

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