Giant photoinduced optical bleaching at room and liquid helium temperatures in Sb/As2S3 multilayered films
| Autor: | K. V. Adarsh, R. Ganesan, K. S. Sangunni, Ramakanta Naik |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Liquid helium Band gap business.industry Physics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics X-ray photoelectron spectroscopy law Transmittance Irradiation Electrical and Electronic Engineering Physical and Theoretical Chemistry Fourier transform infrared spectroscopy business Layer (electronics) |
| Zdroj: | Optics Communications. 284:5319-5322 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2011.07.060 |
| Popis: | We report the observation of giant photo induced optical bleaching in Sb/As(2)S(3) multilayered film at room and liquid He temperatures, when irradiated with 532 nm laser at moderate intensities. The experimental results show a dramatic increase in transmittance near the band gap regime at both the temperatures; however the rates at which transmission change occurs are rather slow at low temperature. The huge change in transmission is due to the photo induced intermixing of As(2)S(3) layer with Sb. Our XPS measurements show that photo induced intermixing occurs through the wrong homopolar bonds, which under actinic light illumination are converted into energetically favored hetropolar bonds. (C) 2011 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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