Silicon optomechanical crystal resonator at millikelvin temperatures

Author(s)

Sean M. Meenehan, Justin D. Cohen, Simon Gröblacher, Jeff T. Hill, Amir H. Safavi-Naeini, Markus Aspelmeyer, Oskar Painter

Abstract

Optical measurements of a nanoscale silicon optomechanical crystal cavity with a mechanical resonance frequency of 3.6

GHz are performed at subkelvin temperatures. We infer

optical-absorption-induced heating and damping of the mechanical

resonator from measurements of phonon occupancy and motional sideband

asymmetry. At the lowest probe power and lowest fridge temperature (Tf=10 mK), the localized mechanical resonance is found to couple at a rate of γi/2π=400 Hz (Qm=9×106) to a thermal bath of temperature Tb≈270

mK. These measurements indicate that silicon optomechanical crystals

cooled to millikelvin temperatures should be suitable for a variety of

experiments involving coherent coupling between photons and phonons at

the single quanta level.

Organisation(s)

Quantum Optics, Quantum Nanophysics and Quantum Information

External organisation(s)

California Institute of Technology (Caltech)

Journal

Physical Review A

Volume

90

No. of pages

5

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.90.011803

Publication date

07-2014

Peer reviewed

Yes

Austrian Fields of Science 2012

103026 Quantum optics

Keywords

Portal url

https://ucrisportal.univie.ac.at/en/publications/silicon-optomechanical-crystal-resonator-at-millikelvin-temperatures(9eded0ea-2996-4152-95e4-6cfd86ee44bd).html