M. Haruyama, H. Kato, M. Ogura, Y. Kato, D. Takeuchi, S. Yamasaki, T. Iwasaki, H. Morishita, M. Fujiwara, N. Mizuochi, et al. Electroluminescence of negatively charged single NV centers in diamond. Applied Physics Letters. 2023. 122. 7. 072101-072101