Degenerate two-photon absorption spectra in Bi2O3:B2O3 glasses
| Autor: | Takashi Watanabe, Toshio Tsuchiya, Ken Imanishi, Yuichi Watanabe |
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| Rok vydání: | 1999 |
| Předmět: |
Absorption spectroscopy
business.industry Chemistry Degenerate energy levels Analytical chemistry Electronic structure Photon energy Condensed Matter Physics Two-photon absorption Spectral line Electronic Optical and Magnetic Materials Optics Materials Chemistry Ceramics and Composites business Absorption (electromagnetic radiation) Electronic band structure |
| Zdroj: | Journal of Non-Crystalline Solids. 259:139-143 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/s0022-3093(99)00408-1 |
| Popis: | Degenerate two-photon absorption (TPA) spectra in binary xBi 2 O 3 :(100 x)B 2 O 3 (x 60. 70 and 80 mol%) glasses are measured by an open-aperture Z-scan technique. The degenerate TPA coefficient, β, obtained at a fixed photon energy increases with Bi 2 O 3 content (e.g., 12.8 ± 2.1 and 17.7 ± 3.0 cm/GW at 2.34 eV for x = 60 and x = 80, respectively), while β becomes larger at higher photon energy (e.g., 3.2 ± 0.5 cm/GW at 1.81 eV and 15.1 ± 2.5 cm/GW at 2.51 eV for = 70). The degenerate TPA spectra are reproduced by using a simple formula based on a two-parabolic band model for the electronic structure of the glasses containing heavy metal oxides. |
| Databáze: | OpenAIRE |
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