Photophysics of O-band and transition metal color centers in monolithic silicon for quantum communications

Sarihan, Murat Can; Huang, Jiahui; Kang, Jin Ho; Fan, Cody; Liu, Wei; Azizur-Rahman, Khalifa M.; Liang, Baolai; Wong, Chee Wei

doi:10.1038/s42005-025-01954-0

Title: Photophysics of O-band and transition metal color centers in monolithic silicon for quantum communications

Journal Article · 26 January 2025 · Communications Physics

DOI: https://doi.org/10.1038/s42005-025-01954-0 · OSTI ID:2507508

^[1];

^[1]; Azizur-Rahman, Khalifa M. ^[2]; Liang, Baolai ^[1];

^[1]

Univ. of California, Los Angeles, CA (United States)
Univ. of California, Los Angeles, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT)

Color centers in the O-band (1260–1360 nm) are crucial for realizing long-coherence quantum network nodes in memory-assisted quantum communications. However, only a limited number of O-band color centers have been thoroughly explored in silicon hosts as spin-photon interfaces. This study explores and compares two promising O-band color centers in silicon for high-fidelity spin-photon interfaces: T and *Cu (transition metal) centers. During T center generation process, we observed the formation and dissolution of other color centers, including the copper-silver related centers with a doublet line around 1312 nm (*Cu$$^0_n$$), near the optical fiber zero dispersion wavelength (around 1310 nm). We then investigated the photophysics of both T and *Cu centers, focusing on their emission spectra and spin properties. The *Cu$$^0_0$$ line under a 0.5 T magnetic field demonstrated a 25% broadening, potentially due to spin degeneracy, suggesting that this center can be a promising alternative to T centers.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: National Science Foundation (NSF); US Army Research Office (ARO); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: NA0003525

OSTI ID:: 2507508

Report Number(s):: SAND--2025-01089J

Journal Information:: Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 8; ISSN 2399-3650

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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