Percolative growth of photodarkening in amorphous As2S3 films

A Ganjoo; K Shimakawa; H Kamiya; EA Davis; Jai Singh

doi:10.1103/PhysRevB.62.R14601

Percolative growth of photodarkening in amorphous As2S3 films

A Ganjoo, K Shimakawa, H Kamiya, EA Davis, Jai Singh

Research output: Contribution to journal › Comment/debate

71 Citations (Scopus)

Abstract

The time evolution of changes in the optical absorption coefficient with illumination has been studied for a-As2S3 films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatures. A model of photon-assisted site switching is proposed for the Variation of photodarkening with time, in which the fractional growth in the concentration of photodarkened sites is expressed by a stretched exponential function.

Original language	English
Pages (from-to)	14601-14604
Number of pages	4
Journal	Physical Review B (Condensed Matter and Materials Physics)
Volume	62
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.62.R14601
Publication status	Published - 2000

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10.1103/PhysRevB.62.R14601

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title = "Percolative growth of photodarkening in amorphous As2S3 films",

abstract = "The time evolution of changes in the optical absorption coefficient with illumination has been studied for a-As2S3 films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatures. A model of photon-assisted site switching is proposed for the Variation of photodarkening with time, in which the fractional growth in the concentration of photodarkened sites is expressed by a stretched exponential function.",

keywords = "photostructural changes, photoexpansion, chalcogenides, model",

author = "A Ganjoo and K Shimakawa and H Kamiya and EA Davis and Jai Singh",

year = "2000",

doi = "10.1103/PhysRevB.62.R14601",

language = "English",

volume = "62",

pages = "14601--14604",

journal = "Physical Review B (Condensed Matter and Materials Physics)",

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T1 - Percolative growth of photodarkening in amorphous As2S3 films

AU - Ganjoo, A

AU - Shimakawa, K

AU - Kamiya, H

AU - Davis, EA

AU - Singh, Jai

PY - 2000

Y1 - 2000

N2 - The time evolution of changes in the optical absorption coefficient with illumination has been studied for a-As2S3 films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatures. A model of photon-assisted site switching is proposed for the Variation of photodarkening with time, in which the fractional growth in the concentration of photodarkened sites is expressed by a stretched exponential function.

AB - The time evolution of changes in the optical absorption coefficient with illumination has been studied for a-As2S3 films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatures. A model of photon-assisted site switching is proposed for the Variation of photodarkening with time, in which the fractional growth in the concentration of photodarkened sites is expressed by a stretched exponential function.

KW - photostructural changes

KW - photoexpansion

KW - chalcogenides

KW - model

U2 - 10.1103/PhysRevB.62.R14601

DO - 10.1103/PhysRevB.62.R14601

M3 - Comment/debate

SN - 0163-1829

VL - 62

SP - 14601

EP - 14604

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

IS - 22

ER -

Percolative growth of photodarkening in amorphous As2S3 films

Abstract

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