The optical properties of Ag2Te crystals from THz to UV
Autor: | Wen Hao Lin, Wen Yen Tzeng, Tien Tien Yeh, Chih-Wei Luo, Phuoc Huu Le, Teodor Milenov |
---|---|
Rok vydání: | 2017 |
Předmět: |
Materials science
Photon Band gap Terahertz radiation business.industry Mechanical Engineering Metals and Alloys Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Spectral line Condensed Matter::Materials Science Semiconductor Mechanics of Materials Attenuation coefficient 0103 physical sciences Materials Chemistry Optoelectronics 010306 general physics 0210 nano-technology Spectroscopy business Refractive index |
Zdroj: | Journal of Alloys and Compounds. 725:433-440 |
ISSN: | 0925-8388 |
Popis: | The optical properties of monoclinic Ag2Te crystals are studied in a wide range (3.7 meV–6.2 eV) of photon energies. The measured reflectivity spectra from THz to UV allow unambiguous a photon energy-dependent complex dielectric function, complex refractive index and absorption coefficient to be obtained. The spectral structure in these optical parameters further indicates the coexistence of an indirect transition with a bandgap energy of about 10 meV and a direct transition with a bandgap energy of about 1.84 eV. |
Databáze: | OpenAIRE |
Externí odkaz: |