Cavity mode frequencies and strong optomechanical coupling in two-membrane cavity optomechanics

被引:27
作者
Li, Jie [1 ,2 ]
Xuereb, Andre [3 ,4 ]
Malossi, Nicola [1 ,2 ]
Vitali, David [1 ,2 ]
机构
[1] Univ Camerino, Sch Sci & Technol, Div Phys, I-62032 Camerino, MC, Italy
[2] Ist Nazl Fis Nucl, Sez Perugia, Perugia, Italy
[3] Univ Malta, Dept Phys, MSD-2080 Msida, Malta
[4] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland
关键词
optical cavity; optomechanical systems; radiation pressure; QUANTUM GROUND-STATE; RESONATORS; OSCILLATOR; MOTION;
D O I
10.1088/2040-8978/18/8/084001
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We study the cavity mode frequencies of a Fabry-Perot 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/k, make this two-membrane system the simplest promising platform for implementing cavity optomechanics in the strong coupling regime.
引用
收藏
页数:8
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