Multi-wavelength Spin Dynamics of Defects in Hexagonal Boron Nitride

Abstract

Optically addressable solid-state spin defects are essential platforms for quantum sensing and information processing. Recently, single spin defects with combined S = 1 and S = 1/2 spin transitions were discovered in hexagonal boron nitride (hBN). In this work we unveil their excitation dynamics. In particular, we study the effects of the excitation wavelength on the spin-dependent fluorescence and the spin dynamics of these peculiar quantum spin defects. We find that changing the excitation wavelength leads to a threefold enhancement in both the optically detected magnetic resonance (ODMR) contrast and the corresponding magnetic field sensitivity. In addition, we find that the excitation wavelength has a strong impact on the photodynamics of spin complex emitters. Our work presents valuable insights to the mechanistic understanding of spin complex emitters in hBN and highlights the importance of excitation wavelength for optimising their performance in quantum sensing and quantum technologies.

References in corpus (21)

• Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
• Avoiding power broadening in optically detected magnetic resonance of single NV defects for enhanced DC-magnetic field sensitivity
• Identifying Carbon as the Source of Visible Single Photon Emission from Hexagonal Boron Nitride
• Sub-nanoscale Temperature, Magnetic Field and Pressure sensing with Spin Centers in 2D hexagonal Boron Nitride
• Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride
• Optical absorption and emission mechanisms of single defects in hexagonal boron nitride
• High-contrast plasmonic-enhanced shallow spin defects in hexagonal boron nitride for quantum sensing
• Wide Field Imaging of van der Waals Ferromagnet Fe3GeTe2 by Spin Defects in Hexagonal Boron Nitride
• First-principles identification of single photon emitters based on carbon clusters in hexagonal boron nitride
• Towards $\text{ab initio}$ identification of paramagnetic substitutional carbon defects in hexagonal boron nitride acting as quantum bits
• Wide-field spectral super-resolution mapping of optically active defects in hBN
• Super-resolution imaging of quantum emitters in layered materials
• Excited-state optically detected magnetic resonance of spin defects in hexagonal boron nitride
• Optically-active spin defects in few-layer thick hexagonal boron nitride
• Unveiling the Zero-Phonon Line of the Boron Vacancy Center by Cavity Enhanced Emission
• Multi-species optically addressable spin defects in a van der Waals material
• Single nuclear spin detection and control in a van der Waals material
• Detection of paramagnetic spins with an ultrathin van der Waals quantum sensor
• Resonant and phonon-assisted ultrafast coherent control of a single hBN color center
• Violet to near-infrared optical addressing of spin pairs in hexagonal boron nitride
• Coherent Spins in van der Waals Semiconductor GeS2 at Ambient Conditions