Photostructural transformations in amorphous As2Se3 and As2S3 films

Neufville, J.P. de; Moss, S. C.; Ovshinsky, Stanford R.

doi:10.1016/0022-3093(74)90091-x

Cited by 392 publications

(123 citation statements)

References 34 publications

Supporting

Mentioning

108

Contrasting

Order By: Relevance

“…Light-induced polymerization of chalcogenide glasses is known to be thermally reversible, 6,21 therefore the lightinduced expansion is also thermally reversible, in agreement with our data 4 . We suggest that the thermal reversibility can be due to similar binding energy of S-S ͓50.9 kcal/mol ͑Ref.…”

Section: Discussionsupporting

confidence: 91%

“…This means that the metastable light-induced expansion is a thermally reversible effect, similar to the thermally reversible photodarkening/photobleaching. 6 Figure 2 shows the kinetics of the diffraction efficiency in the same sample as in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…A thermally irreversible component of the metastable photoexpansion was also reported. 4 It is similar to the thermally irreversible component of photodarkening or photobleaching, 6 which usually accompany 1 the metastable light-induced expansion.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Light-induced relief gratings and a mechanism of metastable light-induced expansion in chalcogenide glasses

et al. 2001

View full text Add to dashboard Cite

We report on a metastable light-induced volume expansion in Ge 25ϩx Ga 10Ϫx S 65 glasses under irradiation with band gap ͑UV͒ light, which can result in recording of relief gratings on their surface in the case of irradiation with two interfering beams. We propose a mechanism for the expansion, which is based on the light-induced change in the polarizability of secondary ͑van der Waals type͒ bonds and the effect of this change on primary ͑covalent type͒ bonds of the glass. The effect is suggested to be due to an interference of electrons, which belong to a chalcogen atom and participate in the formation of secondary and primary bonds, respectively. We suggest that a minimum point of the Lennard-Jones potential, which corresponds to the equilibrium position of a chalcogen atom is shifted in the course of irradiation to a larger interatomic distance. This shift causes a volume expansion and allows a diffusion of chalcogen atoms into the irradiated area. We show that light-induced polymerization of the glass network is an important attribute of the light-induced volume expansion.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Light-induced relief gratings and a mechanism of metastable light-induced expansion in chalcogenide glasses

et al. 2001

View full text Add to dashboard Cite

show abstract

“…4 Among a variety of phenomena, reversible photodarkening is one of the most extensively studied. 1,2,5 When a chalcogenide glass, which may be elemental or compound, is exposed to light, it shows a redshift of the optical-absorption edge, which can be recovered with annealing at the glasstransition temperature. Bandgap light is effective in producing the redshift, 1,5 while subbandgap light can also induce some changes.…”

Section: Introductionmentioning

confidence: 99%

“…1,2,5 When a chalcogenide glass, which may be elemental or compound, is exposed to light, it shows a redshift of the optical-absorption edge, which can be recovered with annealing at the glasstransition temperature. Bandgap light is effective in producing the redshift, 1,5 while subbandgap light can also induce some changes. 1,2,6 The photodarkening phenomenon is demonstrated to arise from photoinduced enhancement of randomness in amorphous structures, 7 while the entity of atomic change is still speculative.…”

Section: Introductionmentioning

confidence: 99%

Photoexpansion inAs2S3glass

Tanaka

1998

Phys. Rev. B

149

View full text Add to dashboard Cite

Mechanisms of photoexpansion in chalcogenide glasses have been studied in three respects. A detailed x-ray investigation of As 2 S 3 shows that the photoexpansion can be connected with asymmetric broadening of the first sharp diffraction peak. Comparison between radiation-induced volume changes and density ratios of glassyto-crystalline forms in As 2 S 3 and SiO 2 implies that As 2 S 3 can expand since the glass is as dense as its crystal. When As 2 S 3 is exposed to illumination, the photoexpansion appears earlier and later than the photodarkening for bandgap and subbandgap illumination, respectively. These observations are discussed from a microscopic point of view. ͓S0163-1829͑98͒09209-1͔

show abstract

Semiconductors, Amorphous—Electronic Properties

Fritzsche

2003

Digital Encyclopedia of Applied Physics

View full text Add to dashboard Cite

Photostructural transformations in amorphous As2Se3 and As2S3 films

Cited by 392 publications

References 34 publications

Light-induced relief gratings and a mechanism of metastable light-induced expansion in chalcogenide glasses

Light-induced relief gratings and a mechanism of metastable light-induced expansion in chalcogenide glasses

Photoexpansion inAs2S3glass

Semiconductors, Amorphous—Electronic Properties

Contact Info

Product

Resources

About