Ultrafast and highly collimated radially polarized photons from a colloidal quantum dot in a hybrid nanoantenna at room-temperature
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913279202295808 |
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| author | Nazarov, Alexander Bloom, Yuval Lubotzky, Boaz Abudayyeh, Hamza Mildner, Annika Baldessarini, Lorenzo Shemla, Yuval Bowes, Eric G. Fleischer, Monika Hollingsworth, Jennifer A. Rapaport, Ronen |
| author_facet | Nazarov, Alexander Bloom, Yuval Lubotzky, Boaz Abudayyeh, Hamza Mildner, Annika Baldessarini, Lorenzo Shemla, Yuval Bowes, Eric G. Fleischer, Monika Hollingsworth, Jennifer A. Rapaport, Ronen |
| contents | To harness the potential of radially polarized single photons in applications such as high-dimensional quantum key distribution (HD-QKD) and quantum communication, we demonstrate an on-chip, room-temperature device, which generates highly directional radially polarized photons at very high rates. The photons are emitted from a giant CdSe/CdS colloidal quantum dot (gQD) accurately positioned at the tip of a metal nanocone centered inside a hybrid metal-dielectric bullseye antenna. We show that due to the large and selective Purcell enhancement specifically for the out-of-plane optical dipole of the gQD, the emitted photons can have a very high degree of radial polarization (>93%), based on a quantitative metric. Our study emphasizes the importance of accurate gQD positioning for optimal radial polarization purity through extensive experiments and simulations, which contribute to the fundamental understanding of radial polarization in nanostructured devices and pave the way for implementation of such systems in practical applications using structured quantum light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_06523 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast and highly collimated radially polarized photons from a colloidal quantum dot in a hybrid nanoantenna at room-temperature Nazarov, Alexander Bloom, Yuval Lubotzky, Boaz Abudayyeh, Hamza Mildner, Annika Baldessarini, Lorenzo Shemla, Yuval Bowes, Eric G. Fleischer, Monika Hollingsworth, Jennifer A. Rapaport, Ronen Optics Quantum Physics To harness the potential of radially polarized single photons in applications such as high-dimensional quantum key distribution (HD-QKD) and quantum communication, we demonstrate an on-chip, room-temperature device, which generates highly directional radially polarized photons at very high rates. The photons are emitted from a giant CdSe/CdS colloidal quantum dot (gQD) accurately positioned at the tip of a metal nanocone centered inside a hybrid metal-dielectric bullseye antenna. We show that due to the large and selective Purcell enhancement specifically for the out-of-plane optical dipole of the gQD, the emitted photons can have a very high degree of radial polarization (>93%), based on a quantitative metric. Our study emphasizes the importance of accurate gQD positioning for optimal radial polarization purity through extensive experiments and simulations, which contribute to the fundamental understanding of radial polarization in nanostructured devices and pave the way for implementation of such systems in practical applications using structured quantum light. |
| title | Ultrafast and highly collimated radially polarized photons from a colloidal quantum dot in a hybrid nanoantenna at room-temperature |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2403.06523 |