تقرير
Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode
| العنوان: | Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode |
|---|---|
| المؤلفون: | Baldacci, Lorenzo, Pitanti, Alessandro, Masini, Luca, Arcangeli, Andrea, Colangelo, Francesco, Navarro-Urrios, Daniel, Tredicucci, Alessandro |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics |
| الوصف: | 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 near-infrared 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 ($\sim 3.4\cdot 10^4$ at $8.3 \cdot 10^{-3}$ mbar) of the fundamental mechanical mode at $\sim 73$ kHz guarantees a detection sensitivity high enough for direct measurement of thermal motion at room temperature ($\sim 87$ pm 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. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1602.08453 |
| رقم الأكسشن: | edsarx.1602.08453 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |