Finding the nitrogen-vacancy singlet manifold energy level using charge conversion pulse sequences

TL;DR

This paper introduces a novel charge conversion pulse sequence method using multi-color laser excitation to precisely locate the NV center singlet manifold energy level in diamond, enhancing understanding of NV center dynamics.

Contribution

The work presents a new pulsed sequence scheme for NV center energy level detection, utilizing multi-color excitation and two readout approaches, advancing experimental techniques in quantum sensing.

Findings

Effective charge conversion pulse sequences were developed.

Two readout methods demonstrated different efficiencies.

The approach improves accuracy in locating NV singlet energy levels.

Abstract

The vast research conducted on Nitrogen-Vacancy (NV) centers in diamond in recent years opened the door for a wide range of NV based applications. However, some properties of the NV center dynamics and energy levels remain unknown. In this work, we propose a charge conversion pulsed sequence scheme for locating the NV center singlet manifold energy level, by multi-color excitation using a tunable laser. We present two approaches for readout - photo-induced current and NV$^0$ population - and discuss their efficiency for different regimes in the relevant spectrum.