Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909162183589888 |
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| author | Ma, Chenxi Yang, Jingzhong Li, Pengji Rugeramigabo, Eddy P. Zopf, Michael Ding, Fei |
| author_facet | Ma, Chenxi Yang, Jingzhong Li, Pengji Rugeramigabo, Eddy P. Zopf, Michael Ding, Fei |
| contents | Efficient generation of entangled photon pairs at telecom wavelengths is a key ingredient for long-range quantum networks. While embedding semiconductor quantum dots into hybrid circular Bragg gratings has proven effective, it conflicts with $p$-$i$-$n$ diode heterostructures which offer superior coherence. We propose and analyze hybrid circular photonic crystal gratings, incorporating air holes to facilitate charge carrier transport without compromising optical properties. Through numerical simulations, a broad cavity mode with a Purcell factor of 23 enhancing both exciton and biexciton transitions, and exceptional collection efficiency of 92.4% into an objective with numerical aperture of 0.7 are achieved. Furthermore, our design demonstrates direct coupling efficiency over 90% into a single-mode fiber over the entire telecom C-band. The hybrid circular photonic crystal grating thereby emerges as a promising solution for the efficient generation of highly coherent, polarization-entangled photon pairs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01447 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band Ma, Chenxi Yang, Jingzhong Li, Pengji Rugeramigabo, Eddy P. Zopf, Michael Ding, Fei Quantum Physics Mesoscale and Nanoscale Physics Optics Efficient generation of entangled photon pairs at telecom wavelengths is a key ingredient for long-range quantum networks. While embedding semiconductor quantum dots into hybrid circular Bragg gratings has proven effective, it conflicts with $p$-$i$-$n$ diode heterostructures which offer superior coherence. We propose and analyze hybrid circular photonic crystal gratings, incorporating air holes to facilitate charge carrier transport without compromising optical properties. Through numerical simulations, a broad cavity mode with a Purcell factor of 23 enhancing both exciton and biexciton transitions, and exceptional collection efficiency of 92.4% into an objective with numerical aperture of 0.7 are achieved. Furthermore, our design demonstrates direct coupling efficiency over 90% into a single-mode fiber over the entire telecom C-band. The hybrid circular photonic crystal grating thereby emerges as a promising solution for the efficient generation of highly coherent, polarization-entangled photon pairs. |
| title | Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2401.01447 |