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Nature nanotechnology
Feb, 2023;18 (2): 124-130.

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

Xuyang Lin, Yaoyao Han, Jingyi Zhu, Kaifeng Wu
Author Information
  1. Xuyang Lin: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China.
  2. Yaoyao Han: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China. ORCID
  3. Jingyi Zhu: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China. ORCID
  4. Kaifeng Wu: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China. kwu@dicp.ac.cn. ORCID
PMID: 36536044 DOI: 10.1038/s41565-022-01279-x

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 hole spins in an ensemble of solution-grown CsPbBr perovskite quantum dots with a single hole in each dot. The hole spins are initialized by sub-picosecond electron scavenging following circularly polarized femtosecond-pulse excitation. A transverse magnetic field induces spin precession, and a second off-resonance femtosecond-pulse coherently rotates hole spins via strong light-matter interaction. These operations accomplish near-complete quantum-state control, with a coherent rotation angle close to the π radian, of hole spins at room temperature.

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Grants

  1. 22173098/National Natural Science Foundation of China (National Science Foundation of China)
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