The role of scattering and absorption on the optical properties of birefringent polycrystalline ceramics: Modeling and experiments on ruby (Cr:Al2O3)
| Autor: | Dean R. Evans, Elias H. Penilla, Sergey Basun, Javier E. Garay, C. L. Hardin, Yasuhiro Kodera |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Birefringence business.industry Scattering Gain General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Light scattering Condensed Matter::Materials Science Optics Condensed Matter::Superconductivity visual_art 0103 physical sciences visual_art.visual_art_medium Optoelectronics Crystallite Ceramic 0210 nano-technology business Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Applied Physics. 119:023106 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.4939090 |
| Popis: | Light scattering due to birefringence has prevented the use of polycrystalline ceramics with anisotropic optical properties in applications such as laser gain media. However, continued development of processing technology has allowed for very low porosity and fine grains, significantly improving transparency and is paving the way for polycrystalline ceramics to be used in demanding optical applications. We present a method for producing highly transparent Cr3+ doped Al2O3 (ruby) using current activated pressure assisted densification. The one-step doping/densification process produces fine grained ceramics with well integrated (doped) Cr, resulting in good absorption and emission. In order to explain the light transmission properties, we extend the analytical model based on the Rayleigh-Gans-Debye approximation that has been previously used for undoped alumina to include absorption. The model presented captures reflection, scattering, and absorption phenomena in the ceramics. Comparison with measured tran... |
| Databáze: | OpenAIRE |
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