Room-temperature optically detected coherent control of molecular spins

Abstract

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.

9 pages, 4 figures

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Cited by in corpus (7)

• Room-temperature quantum sensing with photoexcited triplet electrons in organic crystals
• Chemically Tuning Room Temperature Pulsed Optically Detected Magnetic Resonance
• Open-shell TADF: Quartet-derived luminescence with dark radicals
• Small but large: Single organic molecules as hybrid platforms for quantum technologies
• Growth of few-layer molecular crystals of PTCDI on hexagonal boron nitride by microspacing air-gap sublimation
• Organic molecules as single-photon sources
• Floquet Engineering Clock Transitions in Magnetic Molecules