| Autor: |
Seán M. Meenehan, Justin D. Cohen, Gregory S. MacCabe, Francesco Marsili, Matthew D. Shaw, Oskar Painter |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Physical Review X, Vol 5, Iss 4, p 041002 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.5.041002 |
| Popis: |
Using pulsed optical excitation and read-out along with single-phonon-counting techniques, we measure the transient backaction, heating, and damping dynamics of a nanoscale silicon optomechanical crystal cavity mounted in a dilution refrigerator at a base temperature of T_{f}≈11 mK. In addition to observing a slow (approximately 740-ns) turn-on time for the optical-absorption-induced hot-phonon bath, we measure for the 5.6-GHz “breathing” acoustic mode of the cavity an initial phonon occupancy as low as ⟨n⟩=0.021±0.007 (mode temperature T_{min}≈70 mK) and an intrinsic mechanical decay rate of γ_{0}=328±14 Hz (Q_{m}≈1.7×10^{7}). These measurements demonstrate the feasibility of using short pulsed measurements for a variety of quantum optomechanical applications despite the presence of steady-state optical heating. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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