Thermalization properties at mK temperatures of a nanoscale optomechanical resonator with acoustic-bandgap shield

Autor(en)

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

Abstrakt

Optical measurements of a nanoscale silicon optomechanical crystal cavity with a mechanical resonance frequency of 3.6GHz are performed at sub-kelvin 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 (10mK), the localized mechanical resonance is found to couple at a rate of 400Hz (Q=9x10^6) to a thermal bath of temperature 270mK. 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(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

California Institute of Technology (Caltech)

Anzahl der Seiten

11

DOI

https://doi.org/10.48550/arXiv.1403.3703

Publikationsdatum

03-2014

ÖFOS 2012

103025 Quantenmechanik, 103021 Optik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4db6a6be-14ad-4a54-97b3-9eed13dbee04