Strong coupling at room temperature with a centimeter-scale quartz crystal
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909212226879488 |
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| author | Tomasella, Davide Velez, Santiago Tarrago Nielsen, Sissel Bay Van der Heijden, Joost Hoff, Ulrich Busk Andersen, Ulrik Lund |
| author_facet | Tomasella, Davide Velez, Santiago Tarrago Nielsen, Sissel Bay Van der Heijden, Joost Hoff, Ulrich Busk Andersen, Ulrik Lund |
| contents | Brillouin-based optomechanical systems with high-frequency acoustic modes provide a promising platform for implementing quantum-information processing and wavelength conversion applications, and for probing macroscopic quantum effects. Achieving strong coupling through electrostrictive Brillouin interaction is essential for coupling the massive mechanical mode to an optical field, thereby controlling and characterizing the mechanical state. However, achieving strong coupling at room temperature has proven challenging due to fast mechanical decay rates, which increase the pumping power required to surpass the coupling threshold. Here, we report an optomechanical system with independent control over pumping power and frequency detuning to achieve and characterize the strong-coupling regime of a bulk acoustic-wave resonator. Through spectral analysis of the cavity reflectivity, we identify clear signatures of strong coupling, i.e., normal-mode splitting and an avoided crossing in the detuned spectra, while estimating the mechanical linewidth $Γ_m/2π~=~7.13MHz$ and the single-photon coupling rate $g_0/2π~=~7.76Hz$ of our system. Our results provide valuable insights into the performances of room-temperature macroscopic mechanical systems and their applications in hybrid quantum devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_18107 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Strong coupling at room temperature with a centimeter-scale quartz crystal Tomasella, Davide Velez, Santiago Tarrago Nielsen, Sissel Bay Van der Heijden, Joost Hoff, Ulrich Busk Andersen, Ulrik Lund Quantum Physics Optics Brillouin-based optomechanical systems with high-frequency acoustic modes provide a promising platform for implementing quantum-information processing and wavelength conversion applications, and for probing macroscopic quantum effects. Achieving strong coupling through electrostrictive Brillouin interaction is essential for coupling the massive mechanical mode to an optical field, thereby controlling and characterizing the mechanical state. However, achieving strong coupling at room temperature has proven challenging due to fast mechanical decay rates, which increase the pumping power required to surpass the coupling threshold. Here, we report an optomechanical system with independent control over pumping power and frequency detuning to achieve and characterize the strong-coupling regime of a bulk acoustic-wave resonator. Through spectral analysis of the cavity reflectivity, we identify clear signatures of strong coupling, i.e., normal-mode splitting and an avoided crossing in the detuned spectra, while estimating the mechanical linewidth $Γ_m/2π~=~7.13MHz$ and the single-photon coupling rate $g_0/2π~=~7.76Hz$ of our system. Our results provide valuable insights into the performances of room-temperature macroscopic mechanical systems and their applications in hybrid quantum devices. |
| title | Strong coupling at room temperature with a centimeter-scale quartz crystal |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2405.18107 |