Pulsed photoelectric coherent manipulation and detection of NV centre spins in diamond

TL;DR

This paper demonstrates pulsed photoelectric detection protocols for NV center spins in diamond, enabling coherent spin control and readout with high contrast, advancing scalable quantum device development.

Contribution

It introduces MW pulse protocols for PDMR that filter background currents and demonstrates coherent readout of multiple NV spins in diamond.

Findings

High contrast and S/N ratio achieved in PDMR protocols

Successful Rabi and Ramsey measurements on shallow NV centers

First demonstration of coherent readout of ~5 NV spins

Abstract

Hybrid photoelectric detection of NV magnetic resonances (PDMR) is anticipated to lead to scalable quantum chip technology. To achieve this goal, it is crucial to prove that PDMR readout is compatible with the coherent spin control. Here we present PDMR MW pulse protocols that filter background currents related to ionization of NS0 defects and achieve a high contrast and S/N ratio. We demonstrate Rabi and Ramsey protocols on shallow nitrogen-implanted electronic grade diamond and the coherent readout of ~ 5 NV spins, as a first step towards the fabrication of scalable photoelectric quantum devices.