All-optical magnetic imaging with spin defects in van der Waals materials at Angstrom-scale

Abstract

Magnetic imaging with ultra-high spatial resolution is crucial to exploring the magnetic textures of emerging quantum materials. We propose a novel magnetic imaging protocol that achieves Angstrom-scale resolution by combining spin defects in van der Waals materials and terahertz scattering scanning near-field optical microscopy (THz s-SNOM). Spin defects in the atomic monolayer enable the probe-to-sample distance diving into the Angstrom range where the exchange interactions between the probe and sample spins become predominant. This exchange interaction leads to energy splitting of the probe spin in the order of millielectronvolts, corresponding to THz frequencies. With THz optics and the spin-dependent fluorescence of the probe spin, the interaction energy can be resolved entirely through optical methods. Our proposed all-optical magnetic imaging protocol holds significant promise for investigating magnetic textures in condensed matter physics due to its excellent compatibility and high spatial resolution.

References in corpus (30)

• Topological Insulators
• Topological insulators and superconductors
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Quantum sensing
• Probing condensed matter physics with magnetometry based on nitrogen-vacancy centres in diamond
• Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
• Probing magnetism in 2D materials at the nanoscale with single spin microscopy
• A subpicotesla diamond magnetometer
• Sub-nanoscale Temperature, Magnetic Field and Pressure sensing with Spin Centers in 2D hexagonal Boron Nitride
• Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride
• Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride
• Imaging orbital ferromagnetism in a moiré Chern insulator
• Fabrication of all diamond scanning probes for nanoscale magnetometry
• 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
• Probes for Ultrasensitive THz Nanoscopy
• Nanoscale imaging of equilibrium quantum Hall edge currents and of the magnetic monopole response in graphene
• Quantum sensing and imaging with spin defects in hexagonal boron nitride
• Magnetic Resonance Imaging of Single Atoms
• Room temperature coherent control of protected qubit in hexagonal boron nitride
• Optically-active spin defects in few-layer thick hexagonal boron nitride
• Greatly Enhanced Emission from Spin Defects in Hexagonal Boron Nitride Enabled by a Low-Loss Plasmonic Nano-Cavity
• Nanoscale Electric Field Imaging with an Ambient Scanning Quantum Sensor Microscope
• Spin-defect characteristics of single sulfur vacancies in monolayer ${\text{MoS}}_2$
• Detection of paramagnetic spins with an ultrathin van der Waals quantum sensor
• Magnetic field imaging by hBN quantum sensor nanoarray
• Imaging ferroelectric domains with a single-spin scanning quantum sensor
• Photo-induced blinking in a solid state quantum system
• Proximity-Induced Exchange Interaction: a New Pathway for Quantum Sensing using Spin Centers in Hexagonal Boron Nitride