Torque detection using Brownian fluctuations

被引：86

作者：

Volpe, Giovanni

Petrov, Dmitri

机构：

[1] ICFO, Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain

[2] ICREA, Inst Catalana Recerca & Estudis Avancats, Barcelona 08010, Spain

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.97.210603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the statistical analysis of the movement of a submicron particle confined in a harmonic potential in the presence of a torque. The absolute value of the torque can be found from the auto- and cross-correlation functions of the particle's coordinates. We experimentally prove this analysis by detecting the torque produced onto an optically trapped particle by an optical beam with orbital angular momentum.

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页数：4

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