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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.01139 |
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| _version_ | 1866916983255072768 |
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| author | Purkayastha, Purbita Gonzalez, Cristian Mollazadeh, Cameron Lee, Chang-Min Islam, Fariba Biswas, Abhijit Toney, Michael F. Murray, Christopher B. Waks, Edo |
| author_facet | Purkayastha, Purbita Gonzalez, Cristian Mollazadeh, Cameron Lee, Chang-Min Islam, Fariba Biswas, Abhijit Toney, Michael F. Murray, Christopher B. Waks, Edo |
| contents | Erbium incorporated in a ceria (CeO2) host offers strong potential as a spin qubit platform, providing a pathway toward telecom-compatible quantum memory. But erbium is a dim emitter due to its long excited state lifetime. Methods to enhance its emission rate and efficiency through nanophotonic cavity integration are therefore essential. In this work, we demonstrate cavity-enhanced emission from erbium doped CeO2. We couple colloidally synthesized erbium doped CeO2 nanocrystals to a silicon nanobeam cavity and show a 30-fold improvement in emitter brightness combined with a 2-fold lifetime enhancement. We estimate a lower bound of 12 for the Purcell factor of cavity-coupled emitters after accounting for non-radiative decay. These results pave the way towards utilizing colloidally synthesized optically addressable spin qubits emitting at telecom wavelength for quantum networking and distributed quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_01139 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cavity Enhanced Emission from Telecom Rare-Earth System in Colloidal Host Purkayastha, Purbita Gonzalez, Cristian Mollazadeh, Cameron Lee, Chang-Min Islam, Fariba Biswas, Abhijit Toney, Michael F. Murray, Christopher B. Waks, Edo Optics Erbium incorporated in a ceria (CeO2) host offers strong potential as a spin qubit platform, providing a pathway toward telecom-compatible quantum memory. But erbium is a dim emitter due to its long excited state lifetime. Methods to enhance its emission rate and efficiency through nanophotonic cavity integration are therefore essential. In this work, we demonstrate cavity-enhanced emission from erbium doped CeO2. We couple colloidally synthesized erbium doped CeO2 nanocrystals to a silicon nanobeam cavity and show a 30-fold improvement in emitter brightness combined with a 2-fold lifetime enhancement. We estimate a lower bound of 12 for the Purcell factor of cavity-coupled emitters after accounting for non-radiative decay. These results pave the way towards utilizing colloidally synthesized optically addressable spin qubits emitting at telecom wavelength for quantum networking and distributed quantum computing. |
| title | Cavity Enhanced Emission from Telecom Rare-Earth System in Colloidal Host |
| topic | Optics |
| url | https://arxiv.org/abs/2510.01139 |