Cavity Mode Frequencies and Strong Optomechanical Coupling in Two-Membrane Cavity Optomechanics

Abstract

We study the cavity mode frequencies of a Fabry-Pérot cavity containing two vibrating dielectric membranes. We derive the equations for the mode resonances and provide approximate analytical solutions for them as a function of the membrane positions, which act as an excellent approximation when the relative and center-of-mass position of the two membranes are much smaller than the cavity length. With these analytical solutions, one finds that extremely large optomechanical coupling of the membrane relative motion can be achieved in the limit of highly reflective membranes when the two membranes are placed very close to a resonance of the inner cavity formed by them. We also study the cavity finesse of the system and verify that, under the conditions of large coupling, it is not appreciably affected by the presence of the two membranes. The achievable large values of the ratio between the optomechanical coupling and the cavity decay rate, $g/\kappa$, make this two-membrane system the simplest promising platform for implementing cavity optomechanics in the strong coupling regime.

Contribution to the special issue on "Nano-optomechanics" in Journal of Optics, edited by I. Wilson-Rae, J. Sankey and H. Offerhaus

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• Two-membrane cavity optomechanics: non-linear dynamics
• Antibunching in an optomechanical oscillator
• Optical spatial differentiation with suspended subwavelength gratings
• Flexure-Tuned Membrane-at-the-Edge Optomechanical System
• Cavity optomechanics with arrays of thick dielectric membranes
• Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays
• Quench Dynamics in 1D Optomechanical Arrays
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• Manipulation of nanomechanical resonator via shaking optical frequency
• Enhanced nonlinear interaction effects in a four-mode optomechanical ring
• Long-range optomechanical interactions in SiN membrane arrays
• Temporal oscillations of light transmission through dielectric microparticles subjected to optically induced motion
• Amplitude and phase noise in Two-membrane cavity optomechanics
• Directed graphs and interferometry
• Full dynamics of two-membrane cavity optomechanics
• Estimation of disorders in the rest positions of two membranes in optomechanical systems