标题:Continuously tuning the resonant characteristics of microcantilevers by a laser induced photothermal effect
作者:Gao, Naikun; Luo, Wenyao; Yan, Weishan; Zhang, Dongdong; Liu, Duo
作者机构:[Gao, Naikun; Luo, Wenyao; Yan, Weishan; Zhang, Dongdong; Liu, Duo] Shandong Univ, State Key Lab Crystal Mat, 27 South Shanda Rd, Jinan 250100, Shando 更多
通讯作者:Liu, D;Liu, Duo
通讯作者地址:[Liu, D]Shandong Univ, State Key Lab Crystal Mat, 27 South Shanda Rd, Jinan 250100, Shandong, Peoples R China.
来源:JOURNAL OF PHYSICS D-APPLIED PHYSICS
出版年:2019
卷:52
期:38
DOI:10.1088/1361-6463/ab2608
关键词:microcantilever; photothermal excitation; nonlinear response; vibration; frequency; detection limit
摘要:Microcantilever sensors are ultrasensitive devices with miniaturized size and fast responding capability. However, they are generally designed to operate in a very narrow frequency range, which has limited their applications. We present here an all-optical technique that enables efficient actuation and rapid tuning of the vibration behaviors of microcantilevers. In particular, the resonant frequency of a microcantilever beam can be continuously tuned remotely by a laser induced photothermal effect to cover a large range with boosted vibration amplitude, beneficial for improving the detection threshold for force and mass. The underlying principles for photothermal actuation and elastic nonlinearity are discussed in detail. A verification experiment proves its potentials in detecting acoustic waves with frequencies far from the initial resonant frequency of the microcantilever.
收录类别:EI;SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070303916&doi=10.1088%2f1361-6463%2fab2608&partnerID=40&md5=62b3b7b8f86f3790f2d7f8fbcc248234
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