Tunable Tesla-scale magnetic attosecond pulses through ring-current gating

• URL: http://arxiv.org/abs/2309.09654v1
• Date: Mon, 18 Sep 2023 10:37:09 GMT
• Title: Tunable Tesla-scale magnetic attosecond pulses through ring-current gating
• Authors: Alba de las Heras, Franco P. Bonaf\'e, Carlos Hern\'andez-Garc\'ia, Angel Rubio, and Ofer Neufeld
• Abstract summary: Coherent control over electron dynamics in atoms and molecules using high-intensity circularly-polarized laser pulses gives rise to current loops. We propose and demonstrate schemes to generate direct or alternating-current magnetic pulses in the infrared spectral region. Our work paves the way toward the generation of attosecond magnetic fields to probe ultrafast magnetization, chiral responses, and spin dynamics.
• Score: 6.660702499270164
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Coherent control over electron dynamics in atoms and molecules using high-intensity circularly-polarized laser pulses gives rise to current loops, resulting in the emission of magnetic fields. We propose and demonstrate with ab-initio calculations ``current-gating" schemes to generate direct or alternating-current magnetic pulses in the infrared spectral region, with highly tunable waveform and frequency, and showing femtosecond-to-attosecond pulse duration. In optimal conditions, the magnetic pulse can be highly isolated from the driving laser and exhibits a high flux density ($\sim1$ Tesla at few hundred nanometers from the source, with a pulse duration of 787 attoseconds) for application in forefront experiments of ultrafast spectroscopy. Our work paves the way toward the generation of attosecond magnetic fields to probe ultrafast magnetization, chiral responses, and spin dynamics.

Related papers

• Dynamics of Relativistic Vortex Electrons in External Laser Fields [2.4924880547843307]
  vortex electron interactions with electromagnetic fields are essential for advancing particle acceleration techniques, scattering theory in background fields, and obtaining novel electron beams for material diagnostics. We study the propagation of vortex electrons in linearly polarized (LP) and circularly polarized (CP) laser pulses, both separately and in their combined form in two-mode laser pulses. Our findings demonstrate the versatile control over vortex electrons via laser pulses, with our formalism providing a reference for vortex scattering in laser backgrounds and inspiring the laser-controlled achievement of novel vortex modes as targeted diagnostic probes for specialized materials.
  arXiv  Detail & Related papers  (2024-08-05T11:32:50Z)
• Attosecond spectroscopy using vacuum-ultraviolet pulses emitted from laser-driven semiconductors [0.03269212833895299]
  We photoionize Cesium atoms with the vacuum-ultraviolet (VUV) high-harmonics in the presence of a mid-infrared laser field. We observe strong oscillations of the photoelectron yield originating from the instantaneous polarization of the atoms by the laser field. This light source opens a new spectral window for attosecond spectroscopy.
  arXiv  Detail & Related papers  (2024-05-28T08:26:07Z)
• Two-tone spectroscopy for the detection of two-level systems in superconducting qubits [108.40985826142428]
  Two-level systems (TLS) of unclear physical origin are a major contributor to decoherence in superconducting qubits. We propose a novel method that requires only a microwave drive and dispersive readout, and thus also works fixed-frequency qubits.
  arXiv  Detail & Related papers  (2024-04-22T09:53:00Z)
• Spin interaction of non-relativistic neutrons with an ultrashort laser pulse [0.0]
  We study the interaction of slow neutrons with a short magnetic pulse. Explicit expressions are given for a beam of polarized plane wave neutrons subjected to a pulse of spatially constant magnetic field strength.
  arXiv  Detail & Related papers  (2023-12-02T09:07:53Z)
• Quantum control of ro-vibrational dynamics and application to light-induced molecular chirality [39.58317527488534]
  Achiral molecules can be made temporarily chiral by excitation with electric fields. We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
  arXiv  Detail & Related papers  (2023-10-17T20:33:25Z)
• 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)
• Studying ultrafast Rabi dynamics with a short-wavelength seeded free-electron laser [0.47783778796967247]
  We show that femtosecond extreme-ultraviolet pulses from a seeded free-electron laser can drive Rabi oscillations between the ground state and an excited state in helium atoms. The measured photoemission signal revealed an Autler-Townes doublet as well as an avoided crossing. Our results offer opportunities to carry out ultrafast manipulation of coherent processes at short wavelengths using free-electron lasers.
  arXiv  Detail & Related papers  (2022-01-26T14:08:04Z)
• 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)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Tracking the electronic oscillation in molecule with tunneling microscopy [1.7117387510731599]
  Visualizing and controlling electron dynamics over femtosecond timescale play a key role in the design of next-generation electronic devices. We demonstrate the electronic oscillation inside the naphthalene molecule can be tracked by means of the tuning of delay time between two identical femtosecond laser pulses.
  arXiv  Detail & Related papers  (2020-12-23T07:27:33Z)
• Strongly entangled system-reservoir dynamics with multiphoton pulses beyond the two-excitation limit: Exciting the atom-photon bound state [62.997667081978825]
  We study the non-Markovian feedback dynamics of a two-level system interacting with the electromagnetic field inside a semi-infinite waveguide. We compare the trapped excitation for an initially excited quantum emitter and an emitter prepared via quantized pulses containing up to four photons.
  arXiv  Detail & Related papers  (2020-11-07T12:56:16Z)

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

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.