Scientific Results

Low-loss optomechanical oscillator for quantum-optics experiments

Year: 2015

Authors: Borrielli A., Pontin A., Cataliotti F.S., Marconi L., Marin F., Marino F., Pandraud G., Prodi G.A., Serra E., Bonaldi M.

Autors Affiliation: Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division, 38123 Povo, Trento, Italy;
Istituto Nazionale di Fisica Nucleare (INFN), Trento Institute for Fundamental Physics and Application, I-38123 Povo, Trento, Italy;
Dipartimento di Fisica e Astronomia, Università di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy;
INFN, Sezione di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy;
European Laboratory for Non-Linear Spectroscopy (LENS), Via Carrara 1, I-50019 Sesto Fiorentino (FI), Italy;
CNR-INO, Largo Enrico Fermi 6, I-50125 Firenze, Italy;
Department of Microelectronics and Computer Engineering/ECTM/DIMES, Delft University of Technology, Feldmanweg 17, 2628 CT Delft, Netherlands;
Dipartimento di Fisica, Università di Trento, I-38123 Povo, Trento, Italy

Abstract: We present an oscillating micromirror with mechanical quality factors Q up to 1.2 x 10(6) at cryogenic temperature and optical losses lower than 20 ppm. The device is specifically designed to ease the detection of ponderomotive squeezing (or, more generally, to produce a cavity quantum optomechanical system) at frequencies of about 100 kHz. The design allows one to keep under control both the structural loss in the optical coating and the mechanical energy leakage through the support. The comparison between devices with different shapes shows that the residual mechanical loss at 4.2 K is equally contributed by the intrinsic loss of the silicon substrate and of the coating, while at higher temperatures the dominant loss mechanism is thermoelasticity in the substrate. As the modal response of the device is tailored for its use in optical cavities, these features make the device very promising for quantum-optics experiments.

Journal/Review: PHYSICAL REVIEW APPLIED

Volume: 3 (5)      Pages from: 054009  to: 054009

More Information: This work has been supported by MIUR (PRIN 2010-2011, Project No. 20109FPLWN) and by INFN (HUMOR project). A. B. acknowledges financial support by MIUR (FIRB-Futuro in Ricerca 2013, Project No. RBFR13QUVI).
DOI: 10.1103/PhysRevApplied.3.054009

Citations: 10
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