US 12,259,448 B2
Spin state readout device of quantum sensor and spin state readout method
Yan Liu, Beijing (CN); and Renfu Yang, Beijing (CN)
Assigned to Beijing Academy of Quantum Information Sciences, Beijing (CN)
Filed by Beijing Academy of Quantum Information Sciences, Beijing (CN)
Filed on May 17, 2023, as Appl. No. 18/319,119.
Claims priority of application No. 202211044588.1 (CN), filed on Aug. 30, 2022.
Prior Publication US 2024/0069127 A1, Feb. 29, 2024
Int. Cl. G01R 33/26 (2006.01)
CPC G01R 33/26 (2013.01) 20 Claims
OG exemplary drawing
 
1. A spin state readout device of a quantum sensor, the quantum sensor having spin-manipulable electrons, the spin state readout device comprising:
a pumping unit configured to emit a first laser to the quantum sensor to polarize an electron spin state of the quantum sensor;
a probing unit configured to emit a second laser to the quantum sensor to make the spin-polarized quantum sensor in an excited state;
a signal receiving unit configured to receive fluorescence photons emitted from the quantum sensor and convert optical signals into electrical signals; and
a timing unit coupled to the probing unit and the signal receiving unit and configured to time an excited state lifetime of the quantum sensor.