Scanning optical homodyne detection of high-frequency picoscale resonances in cantilever and tuning fork sensors - Condensed Matter > Other Condensed MatterReport as inadecuate




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Abstract: Higher harmonic modes in nanoscale silicon cantilevers and microscale quartztuning forks are detected and characterized using a custom scanning opticalhomodyne interferometer. Capable of both mass and force sensing, theseresonators exhibit high-frequency harmonic motion content with picometer-scaleamplitudes detected in a 2.5 MHz bandwidth, driven by ambient thermalradiation. Quartz tuning forks additionally display both in-plane andout-of-plane harmonics. The first six electronically detected resonances arematched to optically detected and mapped fork eigenmodes. Mass sensingexperiments utilizing higher tuning fork modes indicate >6x sensitivityenhancement over fundamental mode operation.



Author: Gabriel Zeltzer, Jason C. Randel, Amit K. Gupta, Rashid Bashir, Sang-Hun Song, Hari C. Manoharan

Source: https://arxiv.org/







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