High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons
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arXiv
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| Format: | Preprint |
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2024
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| author | Rickert, Lucas Vajner, Daniel A. von Helversen, Martin Schall, Johannes Rodt, Sven Reitzenstein, Stephan Liu, Hanqing Li, Shulun Ni, Haiqiao Niu, Zhichuan Heindel, Tobias |
| author_facet | Rickert, Lucas Vajner, Daniel A. von Helversen, Martin Schall, Johannes Rodt, Sven Reitzenstein, Stephan Liu, Hanqing Li, Shulun Ni, Haiqiao Niu, Zhichuan Heindel, Tobias |
| contents | We present Purcell-enhanced ($F_\mathrm{P}>25$) semiconductor InAs quantum dot decay times of $T_1<30\,$ps, enabled by deterministic hybrid circular Bragg gratings (hCBGs). We investigate the benefits of these short $T_1$ times on the two-photon indistinguishability for quasi-resonant and strictly resonant excitation, and observe visibilities $\geq96\%$ at 12.5$\,$ns time delay of consecutively emitted photons. The strongly Purcell-enhanced decay times enable a high degree of indistinguishability for elevated temperatures of up to 30$\,$K, and moreover, allow for excitation of up to 1.28$\,$GHz repetition rate. Our work highlights the prospects of high Purcell-enhanced solid-state quantum emitters for applications in quantum information and technologies operating at GHz clock-rates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_02543 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons Rickert, Lucas Vajner, Daniel A. von Helversen, Martin Schall, Johannes Rodt, Sven Reitzenstein, Stephan Liu, Hanqing Li, Shulun Ni, Haiqiao Niu, Zhichuan Heindel, Tobias Quantum Physics We present Purcell-enhanced ($F_\mathrm{P}>25$) semiconductor InAs quantum dot decay times of $T_1<30\,$ps, enabled by deterministic hybrid circular Bragg gratings (hCBGs). We investigate the benefits of these short $T_1$ times on the two-photon indistinguishability for quasi-resonant and strictly resonant excitation, and observe visibilities $\geq96\%$ at 12.5$\,$ns time delay of consecutively emitted photons. The strongly Purcell-enhanced decay times enable a high degree of indistinguishability for elevated temperatures of up to 30$\,$K, and moreover, allow for excitation of up to 1.28$\,$GHz repetition rate. Our work highlights the prospects of high Purcell-enhanced solid-state quantum emitters for applications in quantum information and technologies operating at GHz clock-rates. |
| title | High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.02543 |