Surface grating formation and erasing on a-Se films

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Surface relief formation at holographic recording on amorphous selenium films was demonstrated and investigated. The presence of this optical phase modulation component is essential for ensuring significant, stable and erasable optical recording in a-Se films at 290-320 K temperatures, where conventional photodarkening was known as insignificant and unstable. Photocrystallization can only be observed in super-exposed a-Se films at the given experimental conditions of hologram recording. Erasing behavior of surface relief gratings under heat treatment was also investigated in order to reveal further details of the mechanism. Photoinduced structural transformations within the amorphous phase, connected to local ordering under the condition of light-induced fluidity, are proposed as an explanation for the relief formation and erasing. The observed reversible optical recording process may be useful for the various optoelectronic applications of photoconductive a-Se layers.

Original languageEnglish
Pages (from-to)683-687
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume74
Issue number5
DOIs
Publication statusPublished - May 2002

Fingerprint

Optical recording
recording
gratings
Photochromism
Fluidity
Light modulation
Phase modulation
Diffraction gratings
Selenium
Holograms
Optoelectronic devices
light modulation
selenium
Heat treatment
phase modulation
heat treatment
Temperature
temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Surface grating formation and erasing on a-Se films. / Palyok, V.; Szabó, I.; Beke, D.; Kökényesi, S.

In: Applied Physics A: Materials Science and Processing, Vol. 74, No. 5, 05.2002, p. 683-687.

Research output: Contribution to journalArticle

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