標題: Thermally activated state transition technique for femto-Newton-level force measurement
作者: Chen, Feng-Jung
Wong, Jhih-Sian
Hsu, Ken Y.
Hsu, Long
電子物理學系
光電工程學系
Department of Electrophysics
Department of Photonics
公開日期: 1-五月-2012
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. (C) 2012 Optical Society of America
URI: http://hdl.handle.net/11536/15984
ISSN: 0146-9592
期刊: OPTICS LETTERS
Volume: 37
Issue: 9
結束頁: 1469
顯示於類別:期刊論文


文件中的檔案:

  1. 000303662200026.pdf