Ultrasound modulated droplet lasers

Xuzhou Li; Yu Qin; Xiaotian Tan; Yu-Cheng Chen; Qiushu Chen; Wei-Hung Weng; Xueding Wang; Xudong Fan

doi:10.1117/12.2507568

27 February 2019 Ultrasound modulated droplet lasers

Xuzhou Li, Yu Qin, Xiaotian Tan, Yu-Cheng Chen, Qiushu Chen, Wei-Hung Weng, Xueding Wang, Xudong Fan

Proceedings Volume 10878, Photons Plus Ultrasound: Imaging and Sensing 2019; 108784L (2019) https://doi.org/10.1117/12.2507568
Event: SPIE BiOS, 2019, San Francisco, California, United States

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.

Citation Download Citation

Xuzhou Li, Yu Qin, Xiaotian Tan, Yu-Cheng Chen, Qiushu Chen, Wei-Hung Weng, Xueding Wang, and Xudong Fan "Ultrasound modulated droplet lasers", Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108784L (27 February 2019); https://doi.org/10.1117/12.2507568

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