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DOE OSTI · 3002877

Telecom-Wavelength Single-Photon Emitters in Multilayer InSe

Zhao, Huan [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)] (ORCID:0000000249820865)·Hus, Saban M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000234109878)·Chen, Jinli [Univ. of Arizona, Tucson, AZ (United States)]·Yan, Xiaodong [Univ. of Arizona, Tucson, AZ (United States)] (ORCID:0000000277376984)·Lawrie, Benjamin J. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division] (ORCID:000000031431066X)·Jesse, Stephen [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000211688483)·Li, An-Ping [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000344007493)·Liang, Liangbo [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000311990049)·Htoon, Han [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)] (ORCID:0000000336962896)
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Abstract

The development of robust and efficient single-photon emitters (SPEs) at telecom wavelengths is critical for advancements in quantum information science. Two-dimensional (2D) materials have recently emerged as promising sources for SPEs, owing to their high photon extraction efficiency, facile coupling to external fields, and seamless integration into photonic circuits. In this study, we demonstrate the creation of SPEs emitting in the 1000–1550 nm near-infrared range by coupling 2D indium selenide (InSe) with strain-inducing nanopillar arrays. The emission wavelength exhibits a strong dependence on the number of layers. Hanbury Brown and Twiss experiments conducted at 10 K reveal clear photon antibunching, confirming the single-photon nature of the emissions. In conclusion, density-functional-theory calculations and scanning-tunneling-microscopy analyses provide insights into the electronic structures and defect states, elucidating the origins of the SPEs.

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2D MaterialDefectsElectrical conductivityIndium SelenideLayersQuantum mechanicsScanning tunneling microscopySingle-Photon EmitterStrain Engineering

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Zhao, Huan [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)] (ORCID:0000000249820865), Hus, Saban M. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000234109878), Chen, Jinli [Univ. of Arizona, Tucson, AZ (United States)], Yan, Xiaodong [Univ. of Arizona, Tucson, AZ (United States)] (ORCID:0000000277376984), Lawrie, Benjamin J. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division] (ORCID:000000031431066X), Jesse, Stephen [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000211688483), Li, An-Ping [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000344007493), Liang, Liangbo [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)] (ORCID:0000000311990049), Htoon, Han [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)] (ORCID:0000000336962896). 2025-02-13. Telecom-Wavelength Single-Photon Emitters in Multilayer InSe. https://doi.org/10.1021/acsnano.4c13888

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