DOE OSTI · 3371543
A high-resolution molecular spin-photon interface at telecommunication wavelengths
Abstract
Optically addressable electronic spins in polyatomic molecules are a promising platform for quantum information science, with the potential to enable scalable qubit design and integration through atomistic tunability and nanoscale localization. However, optical state- and site-selection are an open challenge. Here, in this work, we introduce an organo-erbium spin qubit in which narrow (megahertz-scale) optical and spin transitions couple to provide high-resolution access to spin degrees of freedom with telecommunication-frequency light. This spin-photon interface enables demonstration of optical spin polarization and readout that distinguishes between spin states and magnetically inequivalent sites in a molecular crystal. Operation at frequencies compatible with mature photonic and microwave devices provides an opportunity for engineering scalable, integrated molecular spin-optical quantum technologies.
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Weiss, Leah R. [University of Chicago, IL (United States)] (ORCID:000000030872708X), Smith, Grant T. [University of Chicago, IL (United States)] (ORCID:0009000697567549), Murphy, Ryan A. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). AmeriFlux] (ORCID:0000000236952295), Golesorkhi, Bahman [University of California, Berkeley, CA (United States)] (ORCID:0000000189223814), Méndez Méndez, José A. [University of Chicago, IL (United States)] (ORCID:0009000869021201), Patel, Priya [University of California, Berkeley, CA (United States)], Niklas, Jens [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0000000264622680), Poluektov, Oleg G. [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0000000330679272), Long, Jeffrey R. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000253241321), Awschalom, David D. [University of Chicago, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0000000285912687). 2025-10-02. A high-resolution molecular spin-photon interface at telecommunication wavelengths. https://doi.org/10.1126/science.ady8677
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