Room-temperature optically detected coherent control of molecular spins
arxiv(2024)
摘要
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
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.
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