Phase change in Ge–Se chalcogenide glasses and its implications on optical temperature-sensing devices
| Autor: | Harish Subbaraman, Yoshifumi Sakaguchi, Maria Mitkova, Al-Amin Ahmed Simon, Bahareh Badamchi |
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| Rok vydání: | 2020 |
| Předmět: |
Phase transition
Materials science Chalcogenide Physics::Optics 01 natural sciences law.invention Condensed Matter::Materials Science symbols.namesake chemistry.chemical_compound Differential scanning calorimetry law 0103 physical sciences Electrical and Electronic Engineering Crystallization Spectroscopy 010302 applied physics business.industry Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Amorphous solid chemistry symbols Optoelectronics business Raman spectroscopy Refractive index |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:11211-11226 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Reversible amorphous to crystalline phase transition introduces high contrast in the optical and electrical properties of chalcogenide glasses. This effect can be utilized by a designated temperature sensor based on optical power measurement as a function of temperature for temperature monitoring. For this purpose, crystallization kinetics and crystal structures of Ge–Se binary chalcogenide glasses were studied with Differential Scanning Calorimetry, Raman spectroscopy, and X-ray diffraction spectroscopy. The refractive index as a function of temperature was also measured to correlate the effect of structural rearrangement at the phase transition point with optical properties. Based on these data, the crystallization process is interpreted as being homogeneous for the stoichiometric composition and heterogeneous for either chalcogenide- or germanium-rich compositions. This specifically affects the optical performance of the films as a function of temperature and suggests the application of chalcogen- or germanium-rich compositions for building the sensor. |
| Databáze: | OpenAIRE |
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