Squeezed light enhanced sensing of a micro-mechanical oscillator (Conference Presentation)

Ulrik Lund Andersen

doi:10.1117/12.2279353

19 September 2017 Squeezed light enhanced sensing of a micro-mechanical oscillator (Conference Presentation)

Ulrik Lund Andersen

Proceedings Volume 10409, Quantum Communications and Quantum Imaging XV; 104090N (2017) https://doi.org/10.1117/12.2279353
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Ultra-precise measurements of various parameters such as the mass of nano-particles, magnetic fields or gravity can be attained by probing the phononic modes of a micro-mechanical oscillator with light. The sensitivity of such measurements is in part governed by the noise of the phononic mode as well as the noise of the probing light mode, so by decreasing the noise of the probe beam an enhanced sensitivity can be expected. We demonstrate this effect by using squeezed states of light where the quantum uncertainty of the relevant quadrature is reduced below the shot noise level. Using this squeezing-enhanced sensitivity effect, we demonstrate 1) improved feedback cooling of a phononic mode in a microtoroidal cavity and 2) improved sensing of a magnetic field using the coupling to a microtoroidal phononic mode via a magnetorestrictive material. We present our recent experimental results and discuss future directions.

Conference Presentation

Citation Download Citation

Ulrik Lund Andersen "Squeezed light enhanced sensing of a micro-mechanical oscillator (Conference Presentation)", Proc. SPIE 10409, Quantum Communications and Quantum Imaging XV, 104090N (19 September 2017); https://doi.org/10.1117/12.2279353

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