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arXiv · 2208.11614

Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots

Xuyang Lin·Yaoyao Han·Jingyi Zhu·Kaifeng Wu
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Abstract

Manipulation of solid-state spin coherence is an important paradigm for quantum information processing. Current systems either operate at very low temperatures or are difficult to scale-up. Developing low-cost, scalable materials whose spins can be coherently manipulated at room temperature is thus highly-attractive for a sustainable future of quantum information science. Here we report ambient-condition all-optical initialization, manipulation and readout of single-hole spins in an ensemble of solution-grown CsPbBr3 perovskite QDs. Single-hole spins are obtained by sub-picosecond electron scavenging following a circularly-polarized femtosecond-pulse excitation. A transversal magnetic field induces spin precession, and a second off-resonance femtosecond-pulse coherently rotates hole spins via strong light-matter interaction. These operations accomplish nearly complete quantum-state control of single-hole spins at room temperature.

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Xuyang Lin, Yaoyao Han, Jingyi Zhu, Kaifeng Wu. 2022-08-24. Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots. https://doi.org/10.1038/s41565-022-01279-x

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