Broadband telecom single-photon emissions from InAs/InP quantum dots grown by MOVPE droplet epitaxy

• URL: http://arxiv.org/abs/2511.16894v1
• Date: Fri, 21 Nov 2025 02:17:21 GMT
• Title: Broadband telecom single-photon emissions from InAs/InP quantum dots grown by MOVPE droplet epitaxy
• Authors: Shichen Zhang, Li Liu, Kai Guo, Xingli Mu, Yuanfei Gao, Junqi Liu, Fengqi Liu, Quanyong Lu, Zhiliang Yuan,
• Abstract summary: In this study, we present a droplet-epitaxy strategy for O-band to C-band single-photon source based semiconductor quantum dots (QDs)<n>We have successfully synthesized InAs/InP QDs with narrow emission lines spanning a broad spectral range of 1600-axial nm.<n>This work provides a crucial platform for future research on integrated microcavity enhancement techniques and coupled QDs with other quantum photonics in the telecom bands.
• Score: 10.876965281818746
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The development of quantum materials for single-photon emission is crucial for the advancement of quantum information technology. Although significant advancement has been witnessed in recent years for single photon sources in near infrared band (λ~700-1000 nm), several challenges have yet to be addressed for ideal single photon emission at the telecommunication band. In this study, we present a droplet-epitaxy strategy for O-band to C-band single-photon source based semiconductor quantum dots (QDs) using metal-organic vapor-phase epitaxy (MOVPE). Via investigating the growth conditions of the epitaxial process, we have successfully synthesized InAs/InP QDs with narrow emission lines spanning a broad spectral range of λ~1200-1600 nm. The morphological and optical properties of the samples were characterized using atomic force microscopy and micro photoluminescence spectroscopy. The recorded single-photon purity of a plain QD structure reaches (g(2)(0) = 0.16), with a radiative recombination lifetime as short as 1.5 ns. This work provides a crucial platform for future research on integrated microcavity enhancement techniques and coupled QDs with other quantum photonics in the telecom bands, offering significant prospects for quantum network applications.

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