Helmholtz-Institute Mainz, Germany

Abstract: 

Negatively charged nitrogen-vacancy (NV) centers in diamond have garnered wide interest as magnetometers, with diverse applications ranging from electron spin resonance and biophysics to material science. NV center spins in diamond are good quantum sensors due to their long coherence time under ambient conditions. They have also the advantages of small size, high spatial resolution, ability to operate over large temperature and pressure ranges, and wide bandwidth. In this talk, I will introduce novel techniques for magnetometry with NV centers—microwave (MW)-free magnetometry based on the ground-state level anticrossing and zero-field magnetometry realized with circularly polarized MWs—which extends the dynamic range of magnetic sensing and opens up new avenues of application. These techniques are demonstrated with NV ensembles, but these are potentially applicable to single-NV sensors as well.

Brief CV of Dr. Huijie Zheng:

Dr. Huijie Zheng is currently a research fellow in the Helmholtz-Institute Mainz, Germany. She received Ph.D. in quantum physics from the Johannes Gutenberg University Mainz in 2020 and continued to work as a postdoc. Her research focuses on quantum precision measurement with nitrogen-vacancy centers in diamond. She was awarded “Outstanding Female Junior Researcher” Award (Switzerland, 2019).

Host: Prof. Gangqin Liu, Lab of Solid State Quantum Information & Computation

Contact: Liu Yang（杨柳）
Email: yangliu@iphy.ac.cn
Tel: (+86)-10-82649907

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