Multimode Nanobeam Photonic Crystal Cavities for Purcell Enhanced Quantum Dot Emission
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915398182502400 |
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| author | Song, Junyeob Chanana, Ashish Melo, Emerson Eshbaugh, William Copeland, Craig Sapienza, Luca Flagg, Edward Song, Jin-Dong Srinivasan, Kartik Davanco, Marcelo |
| author_facet | Song, Junyeob Chanana, Ashish Melo, Emerson Eshbaugh, William Copeland, Craig Sapienza, Luca Flagg, Edward Song, Jin-Dong Srinivasan, Kartik Davanco, Marcelo |
| contents | Epitaxial III-V semiconductor quantum dots in nanopthonic structures are promising candidates for implementing on-demand indistinguishable single-photon emission in integrated quantum photonic circuits. Quantum dot proximity to the etched sidewalls of hosting nanophotonic structures, however, has been shown to induce linewidth broadening of excitonic transitions, which limits emitted single-photon indistinguishability. Here, we design and demonstrate GaAs photonic crystal nanobeam cavities that maximize quantum dot distances to etched sidewalls beyond an empirically determined minimum that curtails spectral broadening. Although such geometric constraint necessarily leads to multimode propagation in nanobeams, which significantly complicates high quality factor cavity design, we achieve resonances with quality factors $Q\approx10^3$, which offer the potential for achieving Purcell radiative rate enhancements $F_p\approx100$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_14090 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multimode Nanobeam Photonic Crystal Cavities for Purcell Enhanced Quantum Dot Emission Song, Junyeob Chanana, Ashish Melo, Emerson Eshbaugh, William Copeland, Craig Sapienza, Luca Flagg, Edward Song, Jin-Dong Srinivasan, Kartik Davanco, Marcelo Optics Epitaxial III-V semiconductor quantum dots in nanopthonic structures are promising candidates for implementing on-demand indistinguishable single-photon emission in integrated quantum photonic circuits. Quantum dot proximity to the etched sidewalls of hosting nanophotonic structures, however, has been shown to induce linewidth broadening of excitonic transitions, which limits emitted single-photon indistinguishability. Here, we design and demonstrate GaAs photonic crystal nanobeam cavities that maximize quantum dot distances to etched sidewalls beyond an empirically determined minimum that curtails spectral broadening. Although such geometric constraint necessarily leads to multimode propagation in nanobeams, which significantly complicates high quality factor cavity design, we achieve resonances with quality factors $Q\approx10^3$, which offer the potential for achieving Purcell radiative rate enhancements $F_p\approx100$. |
| title | Multimode Nanobeam Photonic Crystal Cavities for Purcell Enhanced Quantum Dot Emission |
| topic | Optics |
| url | https://arxiv.org/abs/2507.14090 |