Polymer microbottle with flexible tunability for ultrasensitive ultrasound sensing  

作　　者：Liaosha Kuang Jialve Sun Shengnan Huangfu Tinglan Chen Zijing Cai Tian Xu Xuanyi Zhang Bo Ni Fangxing Zhang 

机构地区：[1]School of Physics and Technology,Nantong University,Nantong,226019,China [2]Peking University Yangtze Delta Institute of Optoelectronics,Nantong,226010,China [3]State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics,School of Physics,Peking University,Beijing,100871,China [4]School of Electronic Information Engineering,Shanghai DianJi University,Shanghai,201306,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第3期124-130,共7页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.62305006,and 61701261);the Natural Science Foundation of Jiangsu Province(Grant Nos.BK20230287,BK20230286,and BK20160417);Nantong Social Livelihood Science and Technology Planning Project(Grant Nos.MS12022003,and MS2023071)。

摘　　要：Optical whispering-gallery-mode microcavities have attracted significant attention for their potential in ultrasensitive ultrasound sensing,despite always relying on expensive tunable lasers in applications.In this study,we integrated an electrothermal tuning function inside the microcavity,enabling fast scanning of modes by applying voltages,which helps provide real-time searching and tracking of the optimal mode.Our device demonstrated a quality factor exceeding 10^(6)with a broad tuning range over 33 GHz.This structure achieved high sensitivity in ultrasound detection,with a noise equivalent pressure(NEP)of 3.35 m Pa/Hz^(1/2)at 20 MHz.We further reported the advantages of the mode thermal broadening effect for ultrasound detection,with successfully obtaining high-contrast photoacoustic images.Our research introduces an innovative approach for cost-effective,high-stability ultrasound detection with microcavity,showing great value for application in photoacoustic imaging.

关 键 词：microbottle broad tuning range ultrasound detection photoacoustic imaging 

分 类 号：TQ317[化学工程—高聚物工业] TP212[自动化与计算机技术—检测技术与自动化装置] TP391.41[自动化与计算机技术—控制科学与工程]