University of Science and Technology of China

Chuanfeng Li

Zongquan Zhou

Guangcan Guo

Chao Liu

Yu Ma

Peiyun Li

Tao Tu

Xiao Liu

A quantum storage device, including: a sample cryostat configured to load a storage crystal and a filter crystal and configured to cool the storage crystal and the filter crystal to a preset temperature; a laser control system configured to generate a control light and a signal light to perform a quantum storage of the signal light based on a spin population locking; a quantum state encoding and analysis system configured to perform a quantum state encoding and analysis of signal photons; and a filtering system configured to suppress noise introduced by the control light and extract the signal photons.

Quantum storage device

Provided is a quantum sensor based on a rare-earth-ion doped optical crystal, having: a rare-earth-ion doped optical crystal; a low temperature providing unit, which provides a low temperature operating environment to the rare-earth-ion doped optical crystal; a constant magnetic field generation unit, which applies a constant magnetic field to the rare-earth-ion doped optical crystal; a light field generation unit, which provides a light field performing optical pumping on the rare-earth-ion doped optical crystal to prepare the rare-earth-ions in an initial spin state, and a light field for exciting Raman scattering of the rare-earth-ion doped optical crystal; a pulsed magnetic field generation unit, which applies a pulsed magnetic field perpendicular to the constant magnetic field to the rare-earth-ion doped optical crystal to make the rare-earth-ion doped optical crystal generate a spin echo; and a heterodyne Raman scattering light field detection and analysis unit, which detects and analyzes a Raman scattering light field radiated from the rare-earth-ion doped optical crystal. Further provided are uses of this quantum sensor for magnetic field sensing and electric field sensing as well as a sensing method.

Quantum sensor based on rare-earth-ion doped optical crystal and use thereof

A pulsed electron paramagnetic resonance spectrometer comprises: a microwave excitation generating unit for generating at least one microwave pulse; a microwave conducting unit comprising a resonant cavity and a microwave transmission line for transmitting microwaves, wherein the microwave transmission line is connected between the microwave excitation generating unit and the resonant cavity, and the resonant cavity is for placing a sample; a cryostat and magnet unit comprising a cryostat that performs ultra-low temperature cooling for the microwave resonant cavity, the microwave transmission line being disposed to pass through the cryostat and connected to the resonant cavity; the cryostat and magnet unit further comprises a magnet that provides a resonance test magnetic field around the sample, the resonant cavity being disposed in a room temperature gap of the magnet. The device of the present disclosure characteristics in ultra-low sample temperature (0.1 Kelvin) and is fully functional and easy to operate.

Pulsed electron paramagnetic resonance spectrometer

Growing community of inventors

Anhui, China

Chuanfeng Li