Charge State Manipulation of NV Centers in Diamond under Phonon-Assisted Anti-Stokes Excitation of NV<sup>0</sup>
Yuanfei Gao, Jia‐Min Lai, Yujia Sun, Xue‐Lu Liu, Chaonan Lin, Ping‐Heng Tan, Chongxin Shan, Jun Zhang
Abstract
The manipulation of the charge states of nitrogen-vacancy (NV) centers in diamond is a prerequisite for next-generation quantum sensing, communication, and computing. Here, we use phonon-assisted anti-Stokes excitation to realize the reversible conversion between the NV0 and NV– states. In this case, we observe two decay processes of NV– centers with lifetimes as long as tens of seconds. By studying the kinetics of spectral structure evolution of NV– states, we find that the spectral structure of the NV– center is modulated by the charge state transition process under anti-Stokes excitation. We propose that the main reason is the local electric field generated by the ionization of the NV–, which changes the radiation environment of the color centers. Our results might provide an alternative method to control the charge states of nitrogen-vacancy centers.