Improved optomechanical disk resonator sitting on a pedestal mechanical shield

Aristide Lema\^itre; Christopher Baker; Dac Trung Nguyen; Eduardo Gil-Santos; Giuseppe Leo; Ivan Favero; Pascale Senellart; Sara Ducci; William Hease

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Improved optomechanical disk resonator sitting on a pedestal mechanical shield

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arxiv 1411.6002 v1 pith:DK5FUBTT submitted 2014-11-21 cond-mat.mes-hall physics.optics

Improved optomechanical disk resonator sitting on a pedestal mechanical shield

Dac Trung Nguyen , William Hease , Christopher Baker , Eduardo Gil-Santos , Pascale Senellart , Aristide Lema\^itre , Sara Ducci , Giuseppe Leo

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Ivan Favero

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classification cond-mat.mes-hall physics.optics

keywords mechanicaldiskenhancementfactoroptomechanicalpedestalshieldabove

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We experimentally demonstrate the controlled enhancement of the mechanical quality factor Q of GaAs disk optomechanical resonators. Disks vibrating at 1.3 GHz with a mechanical shield integrated in their pedestal show a Q improvement by a factor 10 to 16. The structure is modeled numerically and different modes of vibration are observed, which shed light on the Q enhancement mechanism. An optimized double-disk geometry is presented that promises Q above the million for a large parameter range.

Improved optomechanical disk resonator sitting on a pedestal mechanical shield

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