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arXiv · 1502.07704

Laser Optomechanics

Weijian Yang·S. Adair Gerke·Kar Wei Ng·Yi Rao·Christopher Chase·Connie J. Chang-Hasnain
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Abstract

Cavity optomechanics explores the coupling between the optical field and the mechanical oscillation to induce cooling and regenerative oscillation in a mechanical oscillator. So far, optomechanics relies on the detuning between the cavity and an external pump laser, where the laser acts only as a power supply. Here, we report a new scheme with mutual coupling between a mechanical oscillator that supports a mirror of a vertical-cavity surface-emitting laser (VCSEL) and the optical field, greatly enhancing the light-matter energy transfer. In this work, we used an ultra-light-weight (130 pg) high-contrast-grating (HCG) mirror in a VCSEL, whose reflectivity spectrum is designed to facilitate strong optomechanical coupling, to demonstrate optomechanically-induced regenerative oscillation of the laser optomechanical cavity with > 550 nm self-oscillation amplitude of the micro-mechanical oscillator, two to three orders of magnitude larger than typical. This new scheme not only offers an efficient approach for high-speed wavelength-swept sources, but also has far-reaching significance in the realization of quantum entanglement of macroscopic objects and ultrasensitive measurement of displacements and forces.

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Weijian Yang, S. Adair Gerke, Kar Wei Ng, Yi Rao, Christopher Chase, Connie J. Chang-Hasnain. 2015-02-26. Laser Optomechanics. https://doi.org/10.1038/srep13700

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