Enhanced dual-beam excitation photoelectric detection of NV magnetic resonances in diamond

TL;DR

This paper introduces a novel dual-beam photoelectric detection method for NV center magnetic resonances in diamond, achieving higher contrast and potentially greater robustness than previous optical detection techniques.

Contribution

It presents a new one-photon ionization dual-beam PDMR protocol based on ab-initio modelling, enhancing contrast and reducing defect sensitivity.

Findings

PDMR contrast of 9%, three times higher than previous work

Demonstration of a novel dual-beam PDMR protocol

Predicted reduced vulnerability to defects such as substitutional nitrogen

Abstract

The core issue for the implementation of the diamond NV centre qubits technology is the sensitive readout of NV spin state. We have recently demonstrated the photoelectric detection of NV magnetic resonances (PDMR), anticipated to be faster and more sensitive than optical detection (ODMR). Here we report on a PDMR contrast of 9 % - three times enhanced compared to previous work - on shallow N-implanted diamond. Based on ab-initio modelling, we demonstrate a novel one-photon ionization dual-beam PDMR protocol. We predict that this scheme is significantly less vulnerable to the influence of defects such as substitutional nitrogen.