4.8 Article

Coherent Spin Preparation of Indium Donor Qubits in Single ZnO Nanowires

期刊

NANO LETTERS
卷 22, 期 5, 页码 2134-2139

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c04156

关键词

quantum technology; ZnO; nanowire; qubit; donor defect

资金

  1. Natural Sciences and Engineering Research Council of Canada
  2. Army Research Office MURI Grant on Ab Initio Solid-State Quantum Materials: Design, Production and Characterization at the Atomic Scale [18057522]
  3. National Science Foundation [1150647]

向作者/读者索取更多资源

Utilizing indium donors, this study demonstrates the favorable optical and electron spin properties in ZnO nanowires. The research shows that the optical line width of single nanowires is comparable to bulk single-crystalline ZnO and successfully achieves spin initialization and observation of coherent population trapping.
Shallow donors in ZnO are promising candidates for photon-mediated quantum technologies. Utilizing the indium donor, we show that favorable donor-bound exciton optical and electron spin properties are retained in isolated ZnO nanowires. The inhomogeneous optical line width of single nanowires (60 GHz) is within a factor of 2 of bulk single-crystalline ZnO. Spin initialization via optical pumping is demonstrated and coherent population trapping is observed. The two-photon absorption width approaches the theoretical limit expected due to the hyperfine interaction between the indium nuclear spin and the donor-bound electron.

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