Related papers: Pulsed magnetic field gradient on a tip for nanoscale imaging of spins

Pulsed magnetic field gradient on a tip for nanoscale imaging of spins

URL: http://arxiv.org/abs/2409.17690v1
Date: Thu, 26 Sep 2024 09:56:02 GMT
Title: Pulsed magnetic field gradient on a tip for nanoscale imaging of spins
Authors: Leora Schein-Lubomirsky, Yarden Mazor, Rainer Stöhr, Andrej Denisenko, Amit Finkler,
Abstract summary: We present a switchable magnetic field gradient on a tip, which is designed to provide a local and controllable magnetic field with a high gradient on the nanometer scale. We incorporate the gradient field with a nanoscale magnetic resonance sensor, a single nitrogen-vacancy (NV) center in diamond, to provide high-resolution magnetic resonance imaging.
Score: 0.0
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: Nanoscale magnetic resonance imaging (nanoMRI) aims at obtaining structure at the single molecule level. Most of the techniques for effecting a nanoMRI gradient use small permanent magnets. Here, we present a switchable magnetic field gradient on a tip, which is designed to provide a local and controllable magnetic field with a high gradient on the nanometer scale. We incorporate the gradient field with a nanoscale magnetic resonance sensor, a single nitrogen-vacancy (NV) center in diamond, to provide high-resolution magnetic resonance imaging. The device is a metal microwire deposited along a quartz tip, with the current flowing along the tip inducing a magnetic field around its apex. This field can be manipulated throughout a measurement by controlling the current along the wire. We achieved gradients as high as 1 $\mathrm{\mu}\text{T/nm}$ at fields weaker than 200 $\mathrm{\mu}\text{T}$. Such a gradient can facilitate electron spin mapping with 1 nm resolution using single NV sensors, allowing for nanoscale imaging of electrons. The ability to switch the current on and off and to position the device with high precision overcomes limitations such as limited emitter contrast and the flexibility in sample preparation. Moreover, we show that proximity of the metallic tip to the sensor modifies the Rabi power in a spatially dependent manner, providing regions with enhanced ($\times$3.5) and decreased Rabi power. This spatial gradient, induced by the tip, offers the opportunity for selective pulses on nearby spin species where the same microwave power will result in different spin manipulation characteristics.

Related papers

Microwave-free imaging magnetometry with nitrogen-vacancy centers in nanodiamonds at near-zero field [0.0]
Magnetometry using Nitrogen-Vacancy (NV) color centers in diamond predominantly relies on microwave spectroscopy. This work demonstrates a wide-field, microwave-free imaging magnetometer utilizing NV centers in nanodiamonds.
arXiv Detail & Related papers (2024-09-03T18:08:48Z)
Vector Magnetometry Using Shallow Implanted NV Centers in Diamond with Waveguide-Assisted Dipole Excitation and Readout [34.114534806002595]
Nitrogen-Vacancy (NV) centers in diamond require scalable integration of 3D waveguides into diamond substrates. We develop a sensing array device with an ensemble of shallow implanted NV centers integrated with arrays of laser-written waveguides for excitation and readout of NV signals.
arXiv Detail & Related papers (2024-07-26T12:55:25Z)
Determining Strain Components in a Diamond Waveguide from Zero-Field ODMR Spectra of NV$^{-}$ Center Ensembles [29.004947615276176]
Laser-written waveguides in diamond promote NV$-$ creation and improve their coupling to light but, at the same time, induce strain in the crystal. We probe NV$-$ spin states experimentally with the commonly used continuous-wave zero-field optically detected magnetic resonance (ODMR) By fitting the model results to the experimentally collected ODMR data, we determine the strain tensor components at different positions, thus determining the strain profile across the waveguide.
arXiv Detail & Related papers (2024-02-09T14:13:30Z)
Scanning spin probe based on magnonic vortex quantum cavities [0.0]
We propose the realization of a nanoscale scanning electron paramagnetic resonance sensor using a vortex core in a thin-film disc. The vortex core can be displaced by using external magnetic fields of a few mT, enabling EPR scanning microscopy with large spatial resolution. Vortex nanocavities could also attain strong coupling to individual spin molecular qubits, with potential applications to mediate qubit-qubit interactions.
arXiv Detail & Related papers (2024-01-12T12:53:49Z)
Roadmap on Nanoscale Magnetic Resonance Imaging [27.807635502685876]
The goal of this article is to report the current state of the art in NanoMRI technologies. It outlines the areas where they are poised to have impact, identify the challenges that lie ahead, and propose methods to meet these challenges. This roadmap also shows how developments in NanoMRI techniques can lead to breakthroughs in emerging quantum science and technology applications.
arXiv Detail & Related papers (2023-12-14T11:54:01Z)
Imaging magnetism evolution of magnetite to megabar pressure range with quantum sensors in diamond anvil cell [57.91882523720623]
We develop an in-situ magnetic detection technique at megabar pressures with high sensitivity and sub-microscale spatial resolution. We observe the macroscopic magnetic transition of Fe3O4 in the megabar pressure range from strong ferromagnetism (alpha-Fe3O4) to weak ferromagnetism (beta-Fe3O4) and finally to non-magnetism (gamma-Fe3O4) The presented method can potentially investigate the spin-orbital coupling and magnetism-superconductivity competition in magnetic systems.
arXiv Detail & Related papers (2023-06-13T15:19:22Z)
Measuring the magnon-photon coupling in shaped ferromagnets: tuning of the resonance frequency [50.591267188664666]
cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures. Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity. We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
arXiv Detail & Related papers (2022-07-08T11:28:31Z)
Scanning gradiometry with a single spin quantum magnetometer [0.0]
We show that gradiometry provides important advantages over static field imaging. We demonstrate the capabilities of gradiometry by imaging the nanotesla fields appearing above topographic defects and atomic steps in an antiferromagnet, direct currents in a graphene device, and para- and diamagnetic metals.
arXiv Detail & Related papers (2022-02-18T11:21:31Z)
Continuous-Wave Frequency Upconversion with a Molecular Optomechanical Nanocavity [46.43254474406406]
We use molecular cavity optomechanics to demonstrate upconversion of sub-microwatt continuous-wave signals at $sim$32THz into the visible domain at ambient conditions. The device consists in a plasmonic nanocavity hosting a small number of molecules. The incoming field resonantly drives a collective molecular vibration, which imprints an optomechanical modulation on a visible pump laser.
arXiv Detail & Related papers (2021-07-07T06:23:14Z)
A high-sensitivity fiber-coupled diamond magnetometer with surface coating [19.468384174783917]
Nitrogen-vacancy quantum defects in diamond offer a promising platform for magnetometry. We present a high-sensitivity and wide-bandwidth fiber-based quantum magnetometer for practical applications.
arXiv Detail & Related papers (2021-02-24T11:53:03Z)
Nanoscale electric-field imaging based on a quantum sensor and its charge-state control under ambient condition [3.775269892652729]
Nitrogen-vacancy centers in diamond can be used as quantum sensors to image the magnetic field with nanoscale resolution. We quantitatively image the contours of electric field from a sharp tip of a qPlus-based atomic force microscope (AFM) and achieved a spatial resolution of 10 nm.
arXiv Detail & Related papers (2020-11-09T14:53:22Z)

This list is automatically generated from the titles and abstracts of the papers in this site.