Design principles for >90% efficiency and >99% indistinguishability broadband quantum dot cavities
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866913977893650432 |
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| author | Dlaka, David Androvitsaneas, Petros Young, Andrew Ma, Qirui Harbord, Edmund Oulton, Ruth |
| author_facet | Dlaka, David Androvitsaneas, Petros Young, Andrew Ma, Qirui Harbord, Edmund Oulton, Ruth |
| contents | Quantum dots have the potential to be the brightest deterministic single photon source with plausible high end applications in quantum computing and cluster state generation. In this work, we re-examine the design of simple micropillars by meticulously examining the structural effects of the decay into leaky channels beyond the atom-like cavity estimation. We show that precise control of the side losses with the diameter and avoidance of propagating Bloch modes in the DBR structure can result in easy to manufacture broadband (Q$\approx750-2500$) micropillars and demonstrate extremely high internal efficiency ($90.5\%-96.4\%$). We also demonstrate that such cavities naturally decouple from the phonon sideband, with the phonon sideband reducing by a factor of $5-33$ allowing us to predict that the photons should show $99.2\%-99.8\%$ indistinguishability. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_02974 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Design principles for >90% efficiency and >99% indistinguishability broadband quantum dot cavities Dlaka, David Androvitsaneas, Petros Young, Andrew Ma, Qirui Harbord, Edmund Oulton, Ruth Quantum Physics Mesoscale and Nanoscale Physics Applied Physics Quantum dots have the potential to be the brightest deterministic single photon source with plausible high end applications in quantum computing and cluster state generation. In this work, we re-examine the design of simple micropillars by meticulously examining the structural effects of the decay into leaky channels beyond the atom-like cavity estimation. We show that precise control of the side losses with the diameter and avoidance of propagating Bloch modes in the DBR structure can result in easy to manufacture broadband (Q$\approx750-2500$) micropillars and demonstrate extremely high internal efficiency ($90.5\%-96.4\%$). We also demonstrate that such cavities naturally decouple from the phonon sideband, with the phonon sideband reducing by a factor of $5-33$ allowing us to predict that the photons should show $99.2\%-99.8\%$ indistinguishability. |
| title | Design principles for >90% efficiency and >99% indistinguishability broadband quantum dot cavities |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2309.02974 |