A theoretical multi-reflection method for analysis of optomechanical behavior of the Fabry–Perot cavity with moving boundary condition

Bahrampour, Abbas; Vahedi, Mohammad; Abdi, Mehdi; Ghobadi, Roohollah; Golshani, Mojtaba; Tofighi, Sara; Parvin, Babak

doi:10.1016/j.optcom.2011.05.074

Cited by 4 publications

(1 citation statement)

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“…is a classical interpretation for the photothermal force, whose time lag is implied in |E(t)| 2 (see Ref. [45]). A comparison between ( 11) and ( 2) leads us to the following relation for the deformation constant…”

Section: B Deformation Constantmentioning

confidence: 99%

Improving the optomechanical entanglement and cooling by photothermal force

Abdi¹,

Bahrampour²

2012

Phys. Rev. A

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Cooling and Entanglement in optomechanical systems coupled through radiation pressure and photothermal force is studied. To develop the photothermal model, we derive an expression for deformation constant of the force. Exploiting linearized quantum Langevin equations we investigate dynamics of such systems. According to our analysis, in addition to separate action of radiation pressure and photothermal force, their cross correlation effect plays an important role in dynamics of the system. We also achieve an exact relation for the phonon number of the mechanical resonator in such systems, and then we derive an analytical expression for it at weak coupling limit. At strong coupling regime, we show that utilizing the photothermal pressure makes the ground state cooling more approachable. The effect of photothermal force on the optomechanical entanglement is investigated in detail. According to our exact numerical and approximate analytical studies, even though the photothermal force is naturally a dissipative force, it can improve the optomechanical entanglement both quantitatively and qualitatively.

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Section: B Deformation Constantmentioning

confidence: 99%