Approaching transform-limited linewidths in telecom-wavelength transitions of ungated quantum dots
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915476884422656 |
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| author | Wakileh, Andrew N. Dalacu, Dan Poole, Philip J. Lamontagne, Boris Moisa, Simona Williams, Robin L. Rotenberg, Nir |
| author_facet | Wakileh, Andrew N. Dalacu, Dan Poole, Philip J. Lamontagne, Boris Moisa, Simona Williams, Robin L. Rotenberg, Nir |
| contents | Highly coherent quantum emitters operating in the telecommunication C-band (1530 - 1565nm), where ultra-low-loss fibers and photonic circuits are available, are crucial to the development of scalable quantum technologies. In this work, we report on a modified Stranski-Krastanov growth scheme using chemical beam epitaxy to enable the generation of high-quality InAs/InP quantum dots, characterized by near-transform-limited linewidths ($Γ_{\mathrm{TL}}$). We demonstrate the growth of highly-symmetric quantum dots with aspect ratios >0.8 and densities ranging from 2 to 22$\,μ$m$^{-2}$. Optical characterization of these sources reveal fine-structure splittings down to $25\pm4\,μ$eV and a single-photon purity of $g^{(2)}(0) = 0.012\pm\mathrm{0.007}$, confirming the quality of these dots. Further, using an etalon to measure the linewidth, in combination with rigorous modelling, we find an upper-bound to the mean, low-power linewidths of only $12.1\pm 6.7\,Γ_\mathrm{TL}$ and, in the best case, $2.8\pm 1.8\,Γ_\mathrm{TL}$. These results represent a significant step in the development of telecom-wavelength quantum light sources which are essential for complex quantum networks and devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_02320 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Approaching transform-limited linewidths in telecom-wavelength transitions of ungated quantum dots Wakileh, Andrew N. Dalacu, Dan Poole, Philip J. Lamontagne, Boris Moisa, Simona Williams, Robin L. Rotenberg, Nir Quantum Physics Mesoscale and Nanoscale Physics Materials Science Optics Highly coherent quantum emitters operating in the telecommunication C-band (1530 - 1565nm), where ultra-low-loss fibers and photonic circuits are available, are crucial to the development of scalable quantum technologies. In this work, we report on a modified Stranski-Krastanov growth scheme using chemical beam epitaxy to enable the generation of high-quality InAs/InP quantum dots, characterized by near-transform-limited linewidths ($Γ_{\mathrm{TL}}$). We demonstrate the growth of highly-symmetric quantum dots with aspect ratios >0.8 and densities ranging from 2 to 22$\,μ$m$^{-2}$. Optical characterization of these sources reveal fine-structure splittings down to $25\pm4\,μ$eV and a single-photon purity of $g^{(2)}(0) = 0.012\pm\mathrm{0.007}$, confirming the quality of these dots. Further, using an etalon to measure the linewidth, in combination with rigorous modelling, we find an upper-bound to the mean, low-power linewidths of only $12.1\pm 6.7\,Γ_\mathrm{TL}$ and, in the best case, $2.8\pm 1.8\,Γ_\mathrm{TL}$. These results represent a significant step in the development of telecom-wavelength quantum light sources which are essential for complex quantum networks and devices. |
| title | Approaching transform-limited linewidths in telecom-wavelength transitions of ungated quantum dots |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Materials Science Optics |
| url | https://arxiv.org/abs/2509.02320 |