Single-photon dynamics of a telecom-band quantum dot emitter integrated with a double solid immersion lens

Published

September 24, 2026

Author(s)

Daehyun Ahn, Ivan Burenkov, Lijun Ma, Young-Ho Ko, Yudong Jang, Donghan Lee, Mohamed Benyoucef, Sergey Polyakov

Abstract

Investigating single-photon dynamics is crucial for understanding and verifying the quantum characteristics of single-photon emitters. Here, we demonstrate a telecom-band quantum dot single-photon emitter integrated with a lithographically aligned double solid immersion lens structure, achieving a collection efficiency of $18(3)\%$}. Using two-time correlation measurements, we observed re-excitation-induced multiphoton emission arising from a long-lived, carrier-induced capture process under non-resonant excitation. Under quasi-resonant excitation, this effect was strongly suppressed, reducing the multiphoton emission probability within a 3 ns window ($g^(2)}_\mathrm3ns}}$) from $0.052(1)$ to $0.0163(4)$. We further performed second-order quantum spectroscopy based on Fourier analysis of the Hong–Ou–Mandel interference to resolve the exciton fine-structure splitting beyond the inhomogeneous broadening limit. This work provides a direct characterization of re-excitation dynamics and coherence properties in a telecom-band single-photon emitter.

Citation

Optica

Volume

13

Issue

10

Pub Type

Journals

Download Paper

https://doi.org/10.1364/OPTICA.609872

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Keywords

Quantum dot, quantum network, telecom band, single-photon emitter, metrology, Hanbury-Brown and Twiss experiment, Hong-Ou-Mandel effect, Fourier analysis

Citation

Ahn, D. , Burenkov, I. , Ma, L. , Ko, Y. , Jang, Y. , Lee, D. , Benyoucef, M. and Polyakov, S. (2026), Single-photon dynamics of a telecom-band quantum dot emitter integrated with a double solid immersion lens, Optica, [online], https://doi.org/10.1364/OPTICA.609872, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=961547 (Accessed October 8, 2026)

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