Ultrafast Plasmonic Rotors for Electron Beams

• URL: http://arxiv.org/abs/2502.17183v1
• Date: Mon, 24 Feb 2025 14:15:58 GMT
• Title: Ultrafast Plasmonic Rotors for Electron Beams
• Authors: Fatemeh Chahshouri, Nahid Talebi,
• Abstract summary: We show that the circulation direction of plasmonic fields plays a crucial role in modulating electron dynamics.<n>These findings highlight the potential of plasmon rotors for shaping electron wavepackets, offering promising applications in ultrafast microscopy, spectroscopy, and quantum information processing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The interaction between free electrons and laser-induced near-fields provides a platform to study ultrafast processes and quantum phenomena while enabling precise manipulation of electron wavefunctions through linear and orbital momentum transfer. Here, by introducing phase offset between two orthogonally polarized laser pulses exciting a gold nanorod, we generate a rotating plasmonic nearfield dipole with clockwise and counterclockwise circulating orientations and investigate its interaction with a slow electron beam. Our findings reveal that the circulation direction of plasmonic fields plays a crucial role in modulating electron dynamics, enhancing coupling strength, and controlling recoil. Furthermore, synchronizing the interaction time of the electron beam with rotational dipolar plasmonic resonances results in significant transfer of angular momenta to the electron beams and deflects the electron wavepackets from their original trajectory. These findings highlight the potential of plasmon rotors for shaping electron wavepackets, offering promising applications in ultrafast microscopy, spectroscopy, and quantum information processing.

Related papers

• Structured free-space optical fields for transverse and longitudinal control of electron matter waves [0.0]
  Controlling free-electron momentum states is of high interest in electron microscopy to achieve momentum and energy resolved probing and manipulation of physical systems. Here, we demonstrate both longitudinal and transverse phase control of a slow electron wavepacket by extending the Kapitza-Dirac effect to spatially-structured pulsed laser beams. The interaction reveals the formation of distinct electron transverse momentum orders, each demonstrating a comb-like electron energy spectrum.
  arXiv  Detail & Related papers  (2024-04-05T16:00:39Z)
• In-situ-tunable spin-spin interactions in a Penning trap with in-bore optomechanics [41.94295877935867]
  We present an optomechanical system for in-situ tuning of the coherent spin-motion and spin-spin interaction strength. We characterize the system using measurements of the induced mean-field spin precession. These experiments show approximately a $times2$ variation in the ratio of the coherent to incoherent interaction strength.
  arXiv  Detail & Related papers  (2024-01-31T11:00:39Z)
• Sequential phase-locked optical gating of free electrons [0.0]
  We numerically explore the potential of sequential interactions between slow electrons and localized dipolar plasmons. We show that a sequential phase-locking method can be employed to precisely manipulate the longitudinal and transverse recoil of the electron wavepacket.
  arXiv  Detail & Related papers  (2023-08-29T13:54:50Z)
• Tailoring Near-Field-Mediated Photon Electron Interactions with Light Polarization [0.0]
  We investigate the effect of the polarization and the spatial profile of plasmonic near-field distributions on shaping free-electrons. We show that polarization of the exciting light can be used as a control knop for disseminating acceleration and deceleration path ways. We also demonstrate the possibility of tailoring the shape of localized plasmons by incorporating specific arrangements of nanorods.
  arXiv  Detail & Related papers  (2022-11-17T10:44:44Z)
• Quantum interaction of sub-relativistic aloof electrons with mesoscopic samples [91.3755431537592]
  Relativistic electrons experience very slight wave packet distortion and negligible momentum recoil when interacting with nanometer-sized samples. Modelling fast electrons as classical point-charges provides extremely accurate theoretical predictions of energy-loss spectra.
  arXiv  Detail & Related papers  (2022-11-14T15:22:37Z)
• Coherent control of the orbital occupation driving the insulator-to-metal Mott transition in V$_2$O$_3$ [40.24757332810004]
  coherent electronic control of the photoinduced insulator-to-metal transition in a Mott Bloch insulator is demonstrated. Results open new routes to selectively switch the functionalities of quantum materials.
  arXiv  Detail & Related papers  (2022-11-03T11:52:45Z)
• Anisotropic electron-nuclear interactions in a rotating quantum spin bath [55.41644538483948]
  Spin-bath interactions are strongly anisotropic, and rapid physical rotation has long been used in solid-state nuclear magnetic resonance. We show that the interaction between electron spins of nitrogen-vacancy centers and a bath of $13$C nuclear spins introduces decoherence into the system. Our findings offer new insights into the use of physical rotation for quantum control with implications for quantum systems having motional and rotational degrees of freedom that are not fixed.
  arXiv  Detail & Related papers  (2021-05-16T06:15:00Z)
• Continuum-electron interferometry for enhancement of photoelectron circular dichroism and measurement of bound, free, and mixed contributions to chiral response [39.58317527488534]
  We develop photoelectron interferometry based on laser-assisted extreme ultraviolet ionization for flexible and robust control of photoelectron circular dichroism in randomly oriented chiral molecules. A comb of XUV photons ionizes a sample of chiral molecules in the presence of a time-delayed infrared or visible laser pulse promoting interferences between components of the XUV-ionized photoelectron wave packet.
  arXiv  Detail & Related papers  (2021-04-15T15:20:57Z)
• Effects of the dynamical magnetization state on spin transfer [68.8204255655161]
  We show that the complex interactions between the spin-polarized electrons and the dynamical states of the local spins can be decomposed into separate processes. Our results suggest that exquisite control of spin transfer efficiency and of the resulting dynamical magnetization states may be achievable.
  arXiv  Detail & Related papers  (2021-01-21T22:12:03Z)
• Free-Electron Shaping Using Quantum Light [0.0]
  Here, we show that control over electron pulse shaping, compression, and statistics can be improved by replacing coherent laser excitation by interaction with quantum light. We find that compression is accelerated for fixed optical intensity by using phase-squeezed light, while amplitude squeezing produces ultrashort double-pulse profiles. The generated electron pulses exhibit periodic revivals in complete analogy to the optical Talbot effect.
  arXiv  Detail & Related papers  (2020-08-03T15:35:43Z)
• Strong interaction of slow electrons with near-field light visited from first principles [0.0]
  We show enhanced coupling can be achieved for systems involving slow electron wavepackets interacting with plasmonic nanoparticles. Our findings pave the way towards a systematic and realistic understanding of electron-light interactions beyond adiabatic approximations.
  arXiv  Detail & Related papers  (2020-03-31T11:18:58Z)

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.