Sub-diffraction optical manipulation of the chargestate of nitrogen vacancy center in diamond

TL;DR

This paper demonstrates sub-diffraction optical control of the charge state of nitrogen vacancy centers in diamond, enhancing nanoscale sensing and quantum information applications through optimized laser techniques.

Contribution

It introduces a novel charge state depletion microscopy method achieving 4.1 nm resolution for NV centers, enabling precise charge and spin state manipulation.

Findings

Achieved 4.1 nm resolution in charge state manipulation.

Enabled selective detection of electron spin states.

Improved spatial resolution for NV center measurements.

Abstract

As a potential candidate for quantum computation and metrology, the nitrogen vacancy (NV)center in diamond presented both challenges and opportunities resulted from charge state conversion. By utilizing different lasers for the photon-induced charge state conversion, we achieved the sub-diffraction charge state manipulation. The charge state depletion (CSD) microscopy resolution was improved to 4.1 nm by optimizing the laser pulse sequences. Subsequently, the electron spin state dynamics of adjacent NV centers were selectively detected via the CSD. The experimental results demonstrated that the CSD can improve the spatial resolution of the measurement of NV centers for nanoscale sensing and quantum information.