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02 November 2024
 
  » arxiv » 0709.0118

 Article overview



Scanning optical homodyne detection of high-frequency picoscale resonances in cantilever and tuning fork sensor
Gabriel Zeltzer ; Jason C. Randel ; Amit K. Gupta ; Rashid Bashir ; Sang-Hun Song ; Hari C. Manoharan ;
Date 2 Sep 2007
AbstractHigher harmonic modes in nanoscale silicon cantilevers and microscale quartz tuning forks are detected and characterized using a custom scanning optical homodyne interferometer. Capable of both mass and force sensing, these resonators exhibit high-frequency harmonic motion content with picometer-scale amplitudes detected in a 2.5 MHz bandwidth, driven by ambient thermal radiation. Quartz tuning forks additionally display both in-plane and out-of-plane harmonics. The first six electronically detected resonances are matched to optically detected and mapped fork eigenmodes. Mass sensing experiments utilizing higher tuning fork modes indicate >6x sensitivity enhancement over fundamental mode operation.
Source arXiv, 0709.0118
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