Room-temperature optically detected coherent control of molecular spins

Benefiting from both molecular tunability and versatile methods for deployment, optically interfaced molecular spins are a promising platform for quantum technologies such as sensing and imaging. Room-temperature optically detected coherent spin control is a key enabler for many applications, combin...

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Bibliographic Details
Main Authors Mena, Adrian, Mann, Sarah K, Cowley-Semple, Angus, Bryan, Emma, Heutz, Sandrine, McCamey, Dane R, Attwood, Max, Bayliss, Sam L
Format Journal Article
LanguageEnglish
Published 12.02.2024
Subjects
Physics - Chemical Physics
Physics - Quantum Physics
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Summary:Benefiting from both molecular tunability and versatile methods for deployment, optically interfaced molecular spins are a promising platform for quantum technologies such as sensing and imaging. Room-temperature optically detected coherent spin control is a key enabler for many applications, combining sensitive readout, versatile spin manipulation, and ambient operation. Here we demonstrate such functionality in a molecular spin system. Using the photoexcited triplet state of organic chromophores (pentacene doped in a para-terphenyl host), we optically detect coherent spin manipulation with photoluminescence contrasts exceeding 10% and microsecond coherence times at room temperature. We further demonstrate how coherent control of multiple triplet sublevels can significantly enhance optical spin contrast, and extend optically detected coherent control to a thermally evaporated thin film, retaining high photoluminescence contrast and coherence times of order one microsecond. These results open opportunities for room-temperature quantum technologies that can be systematically tailored through synthetic chemistry.
DOI:10.48550/arxiv.2402.07572