Whispering-gallery optical microprobe for photoacoustic imaging  

作　　者：JIALVE SUN SHUI-JING TANG JIA-WEI MENG CHANGHUI LI 

机构地区：[1]College of Future Technology,Peking University,Beijing 100871,China [2]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,China [3]Frontiers Science Center for Nano-optoelectronics and State Key Laboratory for Mesoscopic Physics,School of Physics,Peking University,Beijing 100871,China [4]National Biomedical Imaging Center,Peking University,Beijing 100871,China

出　　处：《Photonics Research》2023年第11期I0002-I0008,共7页光子学研究（英文版）

基　　金：China Postdoctoral Science Foundation(2021T140023,2020M680187);National Natural Science Foundation of China(62105006,81421004);National Key Research and Development Program of China(2017YFE0104200)。

摘　　要：Optical ultrasonic probes,exemplified by Fabry–Perot cavities on optical fibers,have small sizes,high sensitivity,and pure optical characteristics,making them highly attractive in high-resolution ultrasonic/photoacoustic imaging,especially in near-field or endoscopic scenarios.Taking a different approach,we demonstrate an ultrasensitive and broadband ultrasound microprobe formed by an optical whispering-gallery-mode polymer microcavity coupled to a U-shaped microfiber.With the h/√igh-quality(Q)factors(>10^(6)),the noise equivalent pressure of the ultrasound microprobe reaches 1.07 m Pa∕Hz with a record broadband response of 150 MHz and a large detection angle of 180°.Our results show that this optical microprobe can overcome the strong decay resulting from ultrasound diverging and medium absorption through short working distances.We further demonstrate high-quality in vivo whole-body photoacoustic imaging of a zebrafish larva.Our implementation provides a new strategy for developing miniature ultrasound detectors and holds great potential for broad applications.

关 键 词：OPTICAL MICROPROBE holds 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]