Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/150156
Title: | Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode |
Author: | Baldacci, Lorenzo Pitanti, Alessandro Masini, Luca Arcangeli, Andrea Colangelo, Francesco Navarro Urrios, Daniel Tredicucci, Alessandro |
Keywords: | Materials làser Òptica Laser materials Optics |
Issue Date: | 19-Aug-2016 |
Publisher: | Nature Publishing Group |
Abstract: | We demonstrate the use of a compound optical cavity as linear displacement detector, by measuring the thermal motion of a silicon nitride suspended membrane acting as the external mirror of a nearinfrared Littrow laser diode. Fluctuations in the laser optical power induced by the membrane vibrations are collected by a photodiode integrated within the laser, and then measured with a spectrum analyzer. The dynamics of the membrane driven by a piezoelectric actuator is investigated as a function of air pressure and actuator displacement in a homodyne configuration. The high Q-factor (~3.4·104 at 8.3·10−3mbar) of the fundamental mechanical mode at ~73kHz guarantees a detection sensitivity high enough for direct measurement of thermal motion at room temperature (~87pm RMS). The compound cavity system here introduced can be employed as a table-top, cost-effective linear displacement detector for cavity optomechanics. Furthermore, thanks to the strong optical nonlinearities of the laser compound cavity, these systems open new perspectives in the study of non-Markovian quantum properties at the mesoscale. |
Note: | Reproducció del document publicat a: https://doi.org/10.1038/srep31489 |
It is part of: | Scientific Reports, 2016, vol. 6, p. 31489 |
URI: | http://hdl.handle.net/2445/150156 |
Related resource: | https://doi.org/10.1038/srep31489 |
ISSN: | 2045-2322 |
Appears in Collections: | Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB)) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
684904.pdf | 684.37 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License