Steady-state squeezing of mechanical modes in a ring-cavity optomechanical system via cubic nonlinearity

Abstract

Abstract: We propose a scheme for generating the steady-state squeezing of mechanical modes in an optomechanical system. The optomechanical system is a ring cavity consisting of a fixed mirror and two oscillating mirrors. The oscillation of the mirrors is not harmonic, but has a cubic nonlinearity. The cavity field is driven by an input laser and exerts a radiation pressure on the oscillating mirrors. We first study the steady-state amplitudes of the cavity field and the mechanical modes, and find that the steady-state amplitudes increase as the power of the driving laser increases. We then investigate the squeezing properties of the mechanical modes, and find that the squeezing can be achieved in a large region of parameters, and it can be enhanced by increasing the cubic nonlinearity and/or the power of the driving laser, and/or by suitably adjusting the frequency detuning between the driving laser and the cavity field. We also find that the squeezing is robust against the thermal phonon noise.

Key words: mechanical nonlinearity

CLC Number:

O431.2

References

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