University of Science and Technology of China

Fazhan Shi

Jiangfeng Du

Zhiyuan Zhao

Shaoyi Xu

Tianyu Xie

Pengfei Wang

Hangyu Liu

Haoyu Sun

Ya Wang

Xiangyu Ye

Xi Kong

Zhiping Yang

Mengqi Wang

Pei Yu

Mengze Shen

Provided is a device based on ensemble nitrogen-vacancy centers, including: a right-angle prism; a dichroic parabolic condensing lens, a bottom opening oblique plane of the dichroic parabolic condensing lens is fixed on an oblique plane of the right-angle prism, and the dichroic parabolic condensing lens is configured to polarize the ensemble nitrogen-vacancy centers by an incident laser and collect a fluorescence signal at the ensemble nitrogen-vacancy center; a diamond, the diamond is a layered diamond, including a first face and a second face opposite to the first face, the first face is fixed at a top of a paraboloid of the dichroic parabolic condensing lens, and the second face includes the ensemble nitrogen-vacancy centers; a Lenz lens attached to the second face and configured to converge microwave magnetic field; a microwave coil located above the Lenz lens and configured to apply microwave magnetic field to the ensemble nitrogen-vacancy centers.

Device based on ensemble nitrogen-vacancy centers

The present disclosure provides a fixed-position defect doping method for a micro-nanostructure based on a self-alignment process, including: S1, sequentially forming a sacrificial layer and a photoresist layer on a surface of a crystal substrate; S2, performing a lithography on the photoresist layer to form a mask hole according to a micro-nano pattern; S3, performing an isotropic etching on the sacrificial layer through the mask hole, and amplifying the micro-nano pattern to the sacrificial layer; S4, performing an ion implantation doping on an exposed crystal surface below the mask hole; S5, removing the photoresist layer, and depositing a mask material; S6, removing the sacrificial layer, and transferring a micro-nano amplified pattern in the sacrificial layer to a mask material pattern; and S7, etching an exposed crystal surface, and removing the mask material on the surface and forming a specific defect by annealing.

Fixed-position defect doping method for micro-nanostructure, and NV center sensor

A method for implementing an atomic clock based on NV-N coupling spin system in diamond and a device are provided. The method includes: applying a pulse sequence to jointly initialize NV electron spins andN nuclear spins; performing a Ramsey interferometry to compare a RF frequency and aN hyperfine coupling; entangling the NV electron spin and the nuclear spin, reading out a state of nuclear spins by collecting a fluorescence signal; calculating a frequency difference between the RF frequency and theN hyperfine coupling according to the fluorescence signal, thereby locking the RF frequency to theN hyperfine coupling; and outputting the RF frequency as a frequency standard.

Method for implementing atomic clock based on NV-15N coupling spin system in diamond and device

A method for implementing an atomic clock based on NV-N coupling spin system in diamond and a device are provided. The method is to lock a RF frequency using aN zero-field splitting and output the RF frequency as a frequency standard. The method includes: applying a pulse sequence to jointly initialize NV electron spins andN nuclear spins; performing a Ramsey interferometry to compare a RF frequency and aN zero-field splitting; entangling the NV electron spin and the nuclear spin, reading out a state of nuclear spins by collecting a fluorescence signal; calculating a frequency difference between the RF frequency and theN zero-field splitting according to the fluorescence signal, thereby locking the RF frequency to theN zero-field splitting; and outputting the RF frequency as a frequency standard.

Implementation method and device of atomic clock based on diamond NV-N coupling spin system

Growing community of inventors

Anhui, China

Fazhan Shi