Exploring Readout Contrasts: Tuning Optical and Electrical Measurements of NV Centers in Diamond

In a recent investigation, researchers at the Munich Center for Quantum Science and Technology, in collaboration with the Technical University of Munich in Germany use our C-WAVE Tunable laser to delve into the nuanced contrasts observed in the electrical and optical readout of NV centers in diamond, shedding light on their dependence on optical excitation wavelength and various excitation schemes.

The study shows that while optically detected magnetic resonance (ODMR) showcases efficient performance within the 480 to 580 nm range, electrically detected magnetic resonance (EDMR) exhibits a pronounced reliance on excitation dynamics. Remarkably, the study uncovers that the most substantial electrically detected contrast, reaching -23%, is attained by resonantly exciting the zero-phonon line of the neutral charge state of NV at 575 nm.

These findings offer crucial insights into the intricacies of NV center behavior, paving the way for refined techniques in both optical and electrical readout methodologies.