Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-09-02
Appl. Phys. Lett. 91, 173124 (2007)
Physics
Condensed Matter
Other Condensed Matter
3 pages, 3 figures, submitted to Applied Physics Letters
Scientific paper
10.1063/1.2803774
Higher 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.
Bashir Rashid
Gupta Amit K.
Manoharan Hari C.
Randel Jason C.
Song Sang-Hun
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