Thermally activated state transition technique for femto-Newton-level force measurement

Feng Jung Chen, Jhih Sian Wong, Ken-Yuh Hsu, Long Hsu*

*Corresponding author for this work

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

We develop and test a thermally activated state transition technique for ultraweak force measurement. As a force sensor, the technique was demonstrated on a classical Brownian bead immersed in water and restrained by a bistable optical trap. A femto-Newton-level flow force imposed on this sensor was measured by monitoring changes in the transition rates of the bead hopping between two energy states. The treatment of thermal disturbances as a requirement instead of a limiting factor is the major feature of the technique, and provides a new strategy by which to measure other ultraweak forces beyond the thermal noise limit.

原文English
頁(從 - 到)1469-1471
頁數3
期刊Optics Letters
37
發行號9
DOIs
出版狀態Published - 1 五月 2012

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