Feedback-enhanced sensitivity in optomechanics: Surpassing the parametric instability barrier

被引：21

作者：

Harris, Glen I. ^{[1
]}

Andersen, Ulrik L. ^{[2
]}

Knittel, Joachim ^{[1
]}

Bowen, Warwick P. ^{[1
]}

机构：

[1] Univ Queensland, Ctr Engn Quantum Syst, St Lucia, Qld 4072, Australia

[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

MIRROR; MOTION; LIGHT;

D O I：

10.1103/PhysRevA.85.061802

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The intracavity power, and hence sensitivity, of optomechanical sensors is commonly limited by parametric instability. Here we characterize the degradation of sensitivity induced by parametric instability in a micron-scale cavity optomechanical system. Feedback via optomechanical transduction and electrical gradient force actuation is applied to suppress the parametric instability. As a result a 5.4-fold increase in mechanical motion transduction sensitivity is achieved to a final value of 1.9 x 10(-18) mHz(-1/2).

引用

页数：5

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