Temperature dependent study of charge-state dynamics of nitrogen-vacancy center in diamond*

Negatively charged nitrogen-vacancy centers in diamond have drawn intense research interest in recent years.  Charge-state conversion of the negatively charged state to the neutral state can be a boon for electrical control of NV centers[1] but also lead to loss of the negatively charged state crucial for sensing and other quantum technologies[2]. Here we aim to report on our results in analyzing temperature-dependent fluorescence spectra of NV ensembles as a function of laser power and magnetic field to shed more light on the charge-state dynamics of NV centers. 

[1] Shields, Brendan J., et al. "Efficient readout of a single spin state in diamond via spin-to-charge conversion." Physical review letters 114.13 (2015): 136402.

[2] Bernien, Hannes, et al. "Heralded entanglement between solid-state qubits separated by three metres." Nature 497.7447 (2013): 86-90.