Single photon emission from lithographically-positioned engineered nanodiamonds for cryogenic applications
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866911098935967744 |
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| author | Tiwari, Vivekanand Liu, Zhaojin Weng, Hao-Cheng Balram, Krishna C Rarity, John G Mandal, Soumen Williams, Oliver A Morley, Gavin W Smith, Joe A |
| author_facet | Tiwari, Vivekanand Liu, Zhaojin Weng, Hao-Cheng Balram, Krishna C Rarity, John G Mandal, Soumen Williams, Oliver A Morley, Gavin W Smith, Joe A |
| contents | Nitrogen-vacancy centres in nanodiamonds (NDs) provide a promising resource for quantum photonic systems. However, developing a technology beyond proof-of-principle physics requires optimally engineering its component parts. In this work, we present a hybrid materials platform by photolithographically positioning ball-milled isotopically-enriched NDs on broadband metal reflectors. The structure enhances the photonic collection efficiency, enabling cryogenic characterisation despite the limited numerical aperture imposed by our cryostat. Our device, with SiO$_2$ above a silver reflector, allows us to perform spectroscopic characterisation at 16 K and measure autocorrelation functions confirming single-photon emission (g$^2$(0)<0.5). Through comparative studies of similar hybrid device configurations, we can move towards optimally engineered techniques for building and analysing quantum emitters in wafer-scale photonic environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_06424 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Single photon emission from lithographically-positioned engineered nanodiamonds for cryogenic applications Tiwari, Vivekanand Liu, Zhaojin Weng, Hao-Cheng Balram, Krishna C Rarity, John G Mandal, Soumen Williams, Oliver A Morley, Gavin W Smith, Joe A Quantum Physics Nitrogen-vacancy centres in nanodiamonds (NDs) provide a promising resource for quantum photonic systems. However, developing a technology beyond proof-of-principle physics requires optimally engineering its component parts. In this work, we present a hybrid materials platform by photolithographically positioning ball-milled isotopically-enriched NDs on broadband metal reflectors. The structure enhances the photonic collection efficiency, enabling cryogenic characterisation despite the limited numerical aperture imposed by our cryostat. Our device, with SiO$_2$ above a silver reflector, allows us to perform spectroscopic characterisation at 16 K and measure autocorrelation functions confirming single-photon emission (g$^2$(0)<0.5). Through comparative studies of similar hybrid device configurations, we can move towards optimally engineered techniques for building and analysing quantum emitters in wafer-scale photonic environments. |
| title | Single photon emission from lithographically-positioned engineered nanodiamonds for cryogenic applications |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2508.06424 |