Journal
PHYSICAL REVIEW A
Volume 92, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.92.031802
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Funding
- DARPA QuASAR program
- ONR YIP
- AFOSR PECASE
- National Science Foundation [1125844]
- Clare Boothe Luce Foundation
- Taiwan Ministry of Education
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125844] Funding Source: National Science Foundation
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The temperature dependence of the asymmetry between Stokes and anti-Stokes Raman scattering can be exploited for self-calibrating, optically based thermometry. In the context of cavity optomechanics, we observe the cavity-enhanced scattering of light interacting with the standing-wave drumhead modes of a Si3N4 membrane mechanical resonator. The ratio of the amplitude of Stokes to anti-Stokes scattered light is used to measure temperatures of optically cooled mechanical modes, down to the level of a few vibrational quanta. We demonstrate that the Raman-ratio technique allows the measurement of the physical temperature of our device over a range extending from cryogenic temperatures to within an order of magnitude of room temperature.
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