Title: Precision-controlled ultrafast electron microscope platforms. A case study: Multiple-order coherent phonon dynamics in 1T-TaSe2 probed at 50 fs–10 fm scales

Journal Article · · Structural Dynamics
DOI: https://doi.org/10.1063/4.0000242 · OSTI ID:2565097

We report on the first detailed beam tests attesting the fundamental principle behind the development of high-current-efficiency ultrafast electron microscope systems where a radio frequency (RF) cavity is incorporated as a condenser lens in the beam delivery system. To allow for the experiment to be carried out with a sufficient resolution to probe the performance at the emittance floor, a new cascade loop RF controller system is developed to reduce the RF noise floor. Temporal resolution at 50 fs in full-width-at-half-maximum and detection sensitivity better than 1% are demonstrated on exfoliated 1T-TaSe2 system under a moderate repetition rate. To benchmark the performance, multi-terahertz edge-mode coherent phonon excitation is employed as the standard candle. The high temporal resolution and the significant visibility to very low dynamical contrast in diffraction signals via high-precision phase-space manipulation give strong support to the working principle for the new high-brightness femtosecond electron microscope systems.

Research Organization:
Michigan State Univ., East Lansing, MI (United States); Niowave, Inc., Lansing, MI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-06ER46309; SC0018529; SC0023633
OSTI ID:
2565097
Journal Information:
Structural Dynamics, Journal Name: Structural Dynamics Journal Issue: 2 Vol. 11; ISSN 2329-7778
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

The fast multipole method in the differential algebra framework
  • Zhang, He; Berz, Martin
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 645, Issue 1 https://doi.org/10.1016/j.nima.2011.01.053
journal July 2011
Development of RF-compressed High-throughput Femtosecond Electron Microscope journal July 2020
Indirect-to-Direct Band Gap Crossover in Few-Layer Transition Metal Dichalcogenides: A Theoretical Prediction journal September 2016
Nanoscale-Femtosecond Imaging of Evanescent Surface Plasmons on Silver Film by Photon-Induced Near-Field Electron Microscopy journal February 2022
Photonics and Plasmonics in 4D Ultrafast Electron Microscopy journal September 2015
Ultrafast Elemental and Oxidation-State Mapping of Hematite by 4D Electron Microscopy journal March 2017
Mapping molecular motions leading to charge delocalization with ultrabright electrons journal April 2013
Quantum coherent optical phase modulation in an ultrafast transmission electron microscope journal May 2015
Imaging and controlling plasmonic interference fields at buried interfaces journal October 2016
High-temporal-resolution electron microscopy for imaging ultrafast electron dynamics journal May 2017
Nonequilibrium dynamics of spontaneous symmetry breaking into a hidden state of charge-density wave journal January 2021
K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 journal July 2022
Electron-beam spectroscopy for nanophotonics journal July 2019
Coherent interaction between free electrons and a photonic cavity journal June 2020
Axial Higgs mode detected by quantum pathway interference in RTe3 journal June 2022
Structural, electronic and vibrational properties of few-layer 2H- and 1T-TaSe2 journal November 2015
10-fs-level synchronization of photocathode laser with RF-oscillator for ultrafast electron and X-ray sources journal January 2017
Ultrafast electron microscopy in materials science, biology, and chemistry journal June 2005
Electron source concept for single-shot sub-100 fs electron diffraction in the 100 keV range journal November 2007
Experimental demonstration of high quality MeV ultrafast electron diffraction journal August 2009
Ultrafast electron diffraction with radio-frequency compressed electron pulses journal August 2012
Single shot time stamping of ultrabright radio frequency compressed electron pulses journal July 2013
Computational and experimental characterization of high-brightness beams for femtosecond electron imaging and spectroscopy journal December 2013
Untangling the contributions of image charge and laser profile for optimal photoemission of high-brightness electron beams journal November 2014
Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory journal July 2015
High current table-top setup for femtosecond gas electron diffraction journal July 2017
Solving the jitter problem in microwave compressed ultrafast electron diffraction instruments: Robust sub-50 fs cavity-laser phase stabilization journal September 2017
Active control of bright electron beams with RF optics for femtosecond microscopy journal July 2017
Direct imaging of plasma waves using ultrafast electron microscopy journal November 2020
Noninvasive time-sorting in radio frequency-compressed ultrafast electron diffraction journal July 2021
Ultrafast spectroscopy of quantum materials journal September 2012
Four-dimensional ultrafast electron microscopy journal May 2005
Macromolecular structural dynamics visualized by pulsed dose control in 4D electron microscopy journal March 2011
Graphene-layered steps and their fields visualized by 4D electron microscopy journal May 2013
Ultrafast atomic view of laser-induced melting and breathing motion of metallic liquid clusters with MeV ultrafast electron diffraction journal January 2022
Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach journal March 2016
Charge-density waves and superlattices in the metallic layered transition metal dichalcogenides journal March 1975
Femtosecond electron diffraction: heralding the era of atomically resolved dynamics journal August 2011
Femtosecond time-resolved MeV electron diffraction journal June 2015
Dark excitons and the elusive valley polarization in transition metal dichalcogenides journal February 2017
Transient three-dimensional structural dynamics in 1 T − TaS e 2 journal March 2020
Structure factor of a charge-density wave journal April 1981
Compression of Subrelativistic Space-Charge-Dominated Electron Bunches for Single-Shot Femtosecond Electron Diffraction journal December 2010
Chiral Phonons at High-Symmetry Points in Monolayer Hexagonal Lattices journal September 2015
Exploring the Charge Density Wave Phase of1T−TaSe2: Mott or Charge-Transfer Gap? journal April 2023
Charge-Density Waves in Metallic, Layered, Transition-Metal Dichalcogenides journal April 1974
Self-organized criticality: An explanation of the 1/ f noise journal July 1987
Ultrafast electron calorimetry uncovers a new long-lived metastable state in 1 T -TaSe 2 mediated by mode-selective electron-phonon coupling journal March 2019
An Atomic-Level View of Melting Using Femtosecond Electron Diffraction journal November 2003
Four-Dimensional Electron Microscopy journal April 2010
Observation of chiral phonons journal February 2018
Ultrafast nanoimaging of the order parameter in a structural phase transition journal January 2021
Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging journal December 2021