| Autor: |
Haghighi, I. Moaddel, Malossi, N., Natali, R., Di Giuseppe, G., Vitali, D. |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Applied 9, 034031 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevApplied.9.034031 |
| Popis: |
An opto--electro--mechanical system formed by a nanomembrane capacitively coupled to an LC resonator and to an optical interferometer has been recently employed for the high--sensitive optical readout of radio frequency (RF) signals [T. Bagci, \emph{et~al.}, Nature {\bf 507}, 81 (2013)]. Here we propose and experimentally demonstrate how the bandwidth of such kind of transducer can be increased by controlling the interference between two--electromechanical interaction pathways of a two--mode mechanical system. With a proof--of--principle device \new{operating at room temperature, we achieve a sensitivity of 300 nV/Hz^(1/2) over a bandwidth of 15 kHz in the presence of radiofrequency noise, and an optimal shot-noise limited sensitivity of 10 nV/Hz^(1/2) over a bandwidth of 5 kHz. We discuss strategies for improving the performance of the device, showing that, for the same given sensitivity, a mechanical multi--mode transducer can achieve a bandwidth} significantly larger than that of a single-mode one. |
| Databáze: |
arXiv |
| Externí odkaz: |
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