Imaging Surfaces and Nanostructures

Abstract

Publications of this research are reported in Science, JACS, JPC, ChemPhysChem, PNAS, Nano Lett., and PCCP. Developmentally, we have advanced ultrafast electron microscopy (and diffraction) to a new level. The electron pulses typically have an energy of 30 keV for diffraction and 100-200 keV for microscopy, corresponding to speeds of 33-70% of the speed of light. Recently, we introduced the concept of tilted optical pulses into diffraction and imaging techniques and demonstrated the methodology experimentally. In a separate contribution, we provided a novel approach for reaching the attosecond time domain. Such attosecond electron pulses are significantly shorter than those achievable with extreme UV light sources near 25 nm (-50 eV) and have the potential for applications in the visualization of ultrafast electron dynamics.

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Document Details

Document Type
Technical Report
Publication Date
Feb 28, 2011
Accession Number
AD1026388

Entities

People

  • Ahmed Zewail

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Crystal Structure
  • Crystallography
  • Crystals
  • Detectors
  • Diffraction
  • Electron Microscopy
  • Imaging Techniques
  • Laser Pulses
  • Light Sources
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Microscopy
  • Modulus Of Elasticity
  • Nanomaterials
  • Phase Transformations

Fields of Study

  • Physics

Readers

  • Nanofabrication and Microfabrication.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics