Purcell-enhanced optical refrigeration
Fuente:
arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914554732085248 |
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| author | Ju, Peng Shen, Kunhong Püschel, Stefan Jin, Yuanbin Tanaka, Hiroki Li, Tongcang |
| author_facet | Ju, Peng Shen, Kunhong Püschel, Stefan Jin, Yuanbin Tanaka, Hiroki Li, Tongcang |
| contents | Optical refrigeration of solids with anti-Stokes fluorescence has been widely explored as a vibration-free cryogenic cooling technology. A minimum temperature of 87 K has been demonstrated with rare-earth ion doped crystals using optical refrigeration. However, the depletion of the upper-lying energy levels in the ground state manifold hinders further cooling to below the liquid nitrogen (LN$_2$) temperatures, restricting its applications. In this work, we introduce a Purcell-enhanced optical refrigeration method to circumvent this limitation. This approach enhances the emission of high-energy photons by coupling the emitters to an optical cavity, blue shifting the mean emission wavelength. Such Purcell-enhanced emission facilitates cooling starting from a lower energy level in the ground state manifold, which exhibits a higher occupation below the LN$_2$ temperatures. Using experimentally measured optical coefficients, our theoretical analysis predicts a minimum achievable internal temperature of about 38 K for a Yb$^{3+}$:YLiF$_{4}$ nanocrystal near a cavity under realistic conditions. The proposed method is applicable to other rare-earth ion doped materials and semiconductors, and will have applications in creating superconducting and other quantum devices through solid-state cooling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_19142 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Purcell-enhanced optical refrigeration Ju, Peng Shen, Kunhong Püschel, Stefan Jin, Yuanbin Tanaka, Hiroki Li, Tongcang Optics Quantum Physics Optical refrigeration of solids with anti-Stokes fluorescence has been widely explored as a vibration-free cryogenic cooling technology. A minimum temperature of 87 K has been demonstrated with rare-earth ion doped crystals using optical refrigeration. However, the depletion of the upper-lying energy levels in the ground state manifold hinders further cooling to below the liquid nitrogen (LN$_2$) temperatures, restricting its applications. In this work, we introduce a Purcell-enhanced optical refrigeration method to circumvent this limitation. This approach enhances the emission of high-energy photons by coupling the emitters to an optical cavity, blue shifting the mean emission wavelength. Such Purcell-enhanced emission facilitates cooling starting from a lower energy level in the ground state manifold, which exhibits a higher occupation below the LN$_2$ temperatures. Using experimentally measured optical coefficients, our theoretical analysis predicts a minimum achievable internal temperature of about 38 K for a Yb$^{3+}$:YLiF$_{4}$ nanocrystal near a cavity under realistic conditions. The proposed method is applicable to other rare-earth ion doped materials and semiconductors, and will have applications in creating superconducting and other quantum devices through solid-state cooling. |
| title | Purcell-enhanced optical refrigeration |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2404.19142 |