Transient and Metastable Photodarkening in Amorphous Chalcogenides

Abstract

Transient photodarkening (PD), which is only observed during illumination, has been discovered in some amorphous chalcogenides. During illumination, total changes in absorption coefficient are a combination of transient and metastable part of PD. The transient PD decays as the illumination is switched off to give the usually observed metastable PD. The decay of the transient part, is similar to the decay of photocurrent in a-As2Se3 suggesting the importance of photocarriers in inducing PD. Although no metastable PD is observed for a-Se at 300 K, there exists transient PD.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011506

Entities

People

  • A. Ganjoo
  • K. Shimakawa

Organizations

  • Gifu University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Advanced Materials
  • Argon Lasers
  • Band Gaps
  • Coefficients
  • Energy Bands
  • Exponential Functions
  • Films
  • Glass Transition Temperature
  • Ion Lasers
  • Laser Beams
  • Lasers
  • Metastable State
  • Physical Properties
  • Thickness
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Neurodegenerative Parkinson's Disease and Rickettsial Disease handbook, including the data level of dopamine, BC, neurons, and PD.