The Study of the Interaction of Intense Picosecond Light Pulse with Materials (1) Measurement of Picosecond Pulse Width Using Two-Photon Conductivity in GaAs. (2) Three Photon Conductivity in CdS.

Abstract

Two-photon conductivity effect in GaAs has been used to map the second order intensity correlation function of the picosecond laser pulse for the first time. Reproducible data were obtained. The contrast ratio is about 1.8. This is limited by the thickness of the sample. In principle this method can be extended to use very thin sample to obtained subpicosecond time resolution. Three photon induced photoconductivity effect has been observed in CdS polycrystalline sample with a mode-locked Nd:glass laser. The three photo absorption coefficient was measured to be 0.043 cc/G(W sq).

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1972
Accession Number
AD0750414

Entities

People

  • Chihhi Lee
  • Sudha Jayaraman

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Coefficients
  • Compound Semiconductors
  • Conductivity
  • Electrical Engineering
  • Glass Lasers
  • Laser Pulses
  • Lasers
  • Light (Electromagnetic Radiation)
  • Light Pulses
  • Materials
  • Neodymium Lasers
  • Radiation
  • Ruby Lasers
  • Semiconductors
  • Two Photon Absorption

Fields of Study

  • Materials science
  • Physics

Readers

  • Optical Physics and Photonics.
  • Semiconductor Device Technology

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Directed Energy - Pulsed-Laser Deposition