International Journal of Optics and Photonics
نشریه انجمن اپتیک و فوتونیک ایران
IJOP
Basic Sciences
http://ijop.ir
1
admin
1735-8590
2538-4007
10.29252/ijop
1735-8590
en
jalali
1393
10
1
gregorian
2015
1
1
9
1
online
1
fulltext
en
Weak Force Measurement in Bistable Optomechanical System
تخصصي
Special
پژوهشي
Research
One of the main milestones in the study of opto-mechanical system is to increase the sensitivity of weak forces measurement up to the standard quantum limit. We have studied the detection of weak force under a bistable condition in red detuned regime. In this case, dynamics of the system behaves asymptotically similar to stationary state and applying external force affects phase and fluctuation of the cavity field. Using the signal to noise ratio, we have found the sensitivity of the system to external force. The system show the maximum sensitivity in the region where bistability approaches zero. We also studied the destructive effects of thermal noise on the sensitivity. Our approach is based on the covariance matrix formalism which can be solved by first Lyapunov theorem.
Bistable region, cavity opto-mechanics, force measurement, quantum Langevin equation, red detuned regime.
19
26
http://ijop.ir/browse.php?a_code=A-10-422-1&slc_lang=en&sid=1
Roohollah
Ghobadi
farid.ghobadi82@gmail.com
`10031947532846001243`

10031947532846001243
No
University of Calgary
Samira
Gholizadeh
farid.ghobadi82@gmail.com
`10031947532846001244`

10031947532846001244
No
University of Mazahndaran
Mojtaba
Mazaheri
mojtaba.mazaheri@hut.ac.ir
`10031947532846001245`

10031947532846001245
Yes
Hamedan /university of Technology