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Proceedings Paper

Ultrasound modulated droplet lasers
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Paper Abstract

We demonstrated the ultrasound modulated droplet lasers, in which the laser intensity from whispering gallery mode (WGM) of oil droplets can be reversibly enhanced up to 20-fold when the ultrasound pressure is beyond a certain threshold. The lasing enhancement was investigated with various ultrasound frequencies and pressures. Furthermore, the ultrasound modulation of the laser output was achieved by controlling the ultrasound pressure, the duty cycle, and the frequency of ultrasound bursts. Its potential application was explored via the study on a human whole blood vessel phantom. A theoretical analysis was also conducted, showing that the laser emission enhancement results from the directional emission from a deformed cavity under ultrasound pressure. Our studies reveal the unique capabilities of ultrasound modulated droplet lasers, which could lead to the development of laser emission-based microscopy for deep tissue imaging with high spatial resolution and detection sensitivity that may overcome the long-standing drawback of traditional fluorescence imaging.

Paper Details

Date Published: 27 February 2019
PDF: 12 pages
Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108784L (27 February 2019); doi: 10.1117/12.2507568
Show Author Affiliations
Xuzhou Li, Univ. of Michigan (United States)
Yu Qin, Univ. of Michigan (United States)
Tongji Univ. (China)
Xiaotian Tan, Univ. of Michigan (United States)
Yu-Cheng Chen, Univ. of Michigan (United States)
Nanyang Technological Univ. (Singapore)
Qiushu Chen, Univ. of Michigan (United States)
Wei-Hung Weng, Massachusetts Institute of Technology (United States)
Xueding Wang, Univ. of Michigan (United States)
Xudong Fan, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 10878:
Photons Plus Ultrasound: Imaging and Sensing 2019
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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