Published August 24, 2015
| Submitted
Report
Open
Optical read out and feedback cooling of a nanostring optomechanical cavity
- Creators
- Krause, Alex G.
- Blasius, Tim D.
-
Painter, Oskar
Abstract
Optical measurement of the motion of a 940 kHz mechanical resonance of a silicon nitride nanostring resonator is demonstrated with a read out noise imprecision reaching 37 dB below that of the resonator's zero-point fluctuations. Via intensity modulation of the optical probe laser, radiation pressure feedback is used to cool and damp the mechanical mode from an initial room temperature occupancy of n_b=6.5×10^6 (T_b=295K) down to a phonon occupation of (n)=66±10, representing a mode temperature of T_m≈3mK. The five decades of cooling is enabled by the system's large single-photon cooperativity (C_1=4) and high quantum efficiency of optical motion detection (η_t=0.27).
Additional Information
The authors would like to thank Dal Wilson and Kartik Srinivasan for helpful discussions. This work was supported by the DARPA QuASaR program through a grant from the Army Research Office, the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech. TDB gratefully acknowledges support from the National Science Foundation Graduate Research Fellowship Program (grant no. 0703267).Attached Files
Submitted - 1506.01249v1.pdf
Files
1506.01249v1.pdf
Files
(4.7 MB)
| Name | Size | Download all |
|---|---|---|
|
md5:afdca16f661d68d764082e5ae14be400
|
4.7 MB | Preview Download |
Additional details
- Eprint ID
- 59829
- Resolver ID
- CaltechAUTHORS:20150824-081716175
- DGE-0703267
- NSF Graduate Research Fellowship
- Army Research Office (ARO)
- Institute for Quantum Information and Matter (IQIM)
- NSF
- Gordon and Betty Moore Foundation
- Kavli Nanoscience Institute
- Defense Advanced Research Projects Agency (DARPA)
- Created
-
2015-08-24Created from EPrint's datestamp field
- Updated
-
2023-06-02Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter, Kavli Nanoscience Institute