Photoinduced phenomena in amorphous As4S3Se3–Sn films
| Autor: | A. M. Nastas, A. Prisacar, O. V. Iaseniuc, I. A. Cojocaru, Mihail Iovu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Stretched exponential function Materials science business.industry Kinetics Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Amorphous solid Optics chemistry 0103 physical sciences Photodarkening 0210 nano-technology Tin business Diffraction grating |
| Zdroj: | Optics and Spectroscopy. 121:140-142 |
| ISSN: | 1562-6911 0030-400X |
| DOI: | 10.1134/s0030400x16070237 |
| Popis: | We investigate the kinetics of photodarkening and recording of holographic diffraction gratings in amorphous As4S3Se3 thin-film structures doped with tin (Sn) in concentrations of 0–10 at %. It is established that an increase in the Sn concentration leads to a decrease in the photodarkening rate and degree. The photodarkening kinetics is approximated by a stretched exponential function. It is found that an increase in the Sn concentration leads to a decrease in the transmission (photodarkening) variation in the investigated As4S3Se3–Sn films. It is determined that, in the recording of holographic diffraction gratings at a Sn concentration of 3–8 at %, the As4S3Se3–Sn films exhibit the maximum sensitivity and diffraction efficiency of the recorded gratings. It is shown that the dependence of diffraction efficiency on the As4S3Se3 film thickness has the maximum at a film thickness of 4 µm. |
| Databáze: | OpenAIRE |
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