Orientation of the NV centers are determined using the cylindrical vector beam array

Abstract

The determination of nitrogen-vacancy centers plays an important role in quantum information sensing. Efficiently and rapidly determining the orientation of multiple nitrogen-vacancy center s in a low-concentration diamond is challenging due to its size. Here, we solve this scientific problem by using an azimuthally polarized beam array as the incident beam. In this paper, the optical pen is used to modulate the position of beam array to excite distinctive fluorescence characterizing multiple and different orientations of nitrogen-vacancy centers. The important result is that in a low concentration diamond layer, the orientation of multiple NV centers can be judged except when they are too close within the diffraction limit. Hence, this efficient and rapid method has a good application prospect in quantum information sensing.

Controlled Polarized Optical Excitation Method on Ensembles of Nitrogen‐Vacancy Centers in Diamonds

“…Here, we propose a controlled polarized optical excitation method that can better distinguish the crystal axes with the potential to perform vector magnetometry without a magnetic bias field. Specifically, with the aid of an optical pen (OP), a modulation tool developed in our previous studies, [ 24,25 ] we can generate polarized beams that are intentionally not parallel to the diamond surface, creating a controlled tilt angle. The polarization angle of the excitation beam can be adjusted in free space to improve optical selection.…”