Time-Resolved Surface Structural Study by Picosecond Reflection High- Energy Electron Diffraction

Abstract

The objective of this program was to develop an instrument for characterization of nanosecond and picosecond time evolution of surface properties. This instrument was developed based on the technique of picosecond time-resolved reflection high-energy electron diffraction (RHEED). The basic idea of this technique is the utilization of 150 ps laser pulses to generate electron pulses by the photoelectric effect. The photogenerated electrons are accelerated, focused, and collimated using electron optics. Only a very small fraction of the laser pulse energy is needed to generate the fast (10-30 kV) well-collimated electron pulses; thus, most of the laser energy is available for sample irradiation. (eg)

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Document Details

Document Type
Technical Report
Publication Date
Mar 21, 1989
Accession Number
ADA218417

Entities

People

  • Hani E. Elsayed

Organizations

  • University of Rochester

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Diffraction
  • Equations Of State
  • Fabrication
  • Field Effect Transistors
  • Heat Energy
  • Lasers
  • Measurement
  • Optical Properties
  • Optics
  • Phase Transformations
  • Scattering
  • Surface Properties
  • Surface Temperature
  • Transition Temperature
  • Transitions
  • Ultraviolet Lasers

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Microelectronics