Excited-state spectroscopy of spin defects in hexagonal boron nitride

Abstract

We used optically detected magnetic resonance (ODMR) technique to directly probe electron-spin resonance transitions in the excited state of negatively-charged boron vacancy (VB-) defects in hexagonal boron nitride (hBN) at room temperature. The data showed that the excited state has a zero-field splitting of ~ 2.1 GHz, a g factor similar to the ground state and two types of hyperfine splitting ~ 90 MHz and ~ 18.8 MHz respectively. Pulsed ODMR experiments were conducted to further verify observed resonant peaks corresponding to spin transitions in the excited state. In addition, negative peaks in photoluminescence and ODMR contrast as a function of magnetic field magnitude and angle at level anti-crossing were observed and explained by coherent spin precession and anisotropic relaxation. This work provided significant insights for studying the structure of VB- excited states, which might be used for quantum information processing and nanoscale quantum sensing.

References in corpus (14)

• Two-Dimensional Material Nanophotonics
• Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Anisotropic interactions of a single spin and dark-spin spectroscopy in diamond
• Sub-nanoscale Temperature, Magnetic Field and Pressure sensing with Spin Centers in 2D hexagonal Boron Nitride
• Low temperature studies of the excited-state structure of Nitrogen-Vacancy color centers in diamond
• Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride
• Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride
• Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance
• Excited-state spectroscopy using single-spin manipulation in diamond
• Single spin resonance in a van der Waals embedded paramagnetic defect
• High-contrast plasmonic-enhanced shallow spin defects in hexagonal boron nitride for quantum sensing
• Photoluminescence and photochemistry of the $V_B^{-}$ defect in hexagonal boron nitride
• Coupling spin defects in hexagonal boron nitride to monolithic bullseye cavities

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• Coherent control of an ultrabright single spin in hexagonal boron nitride at room temperature
• Excited-state spin-resonance spectroscopy of V${}_{\text{B}}^{-}$ defect centers in hexagonal boron nitride
• Greatly Enhanced Emission from Spin Defects in Hexagonal Boron Nitride Enabled by a Low-Loss Plasmonic Nano-Cavity
• Isotope engineering for spin defects in van der Waals materials
• Isotopic control of the boron-vacancy spin defect in hexagonal boron nitride
• Quantum sensing of paramagnetic spins in liquids with spin qubits in hexagonal boron nitride
• Robust Nuclear Spin Polarization via Ground-State Level Anti-Crossing of Boron Vacancy Defects in Hexagonal Boron Nitride
• Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
• Carbon-based single photon emitters in hexagonal boron nitride with triplet ground state
• Coupling spin defects in hexagonal boron nitride to a microwave cavity
• Quantifying the creation of negatively charged boron vacancies in He-ion irradiated hexagonal boron nitride
• Room-Temperature Electrical Readout of Spin Defects in van der Waals Materials
• Spin-State Selective Excitation in Spin Defects of Hexagonal Boron Nitride
• Room-temperature hybrid 2D-3D quantum spin system for enhanced magnetic sensing and many-body dynamics
• Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride