Remarkable optical properties of dendrimers for laser applications

2001 ◽  
Author(s):  
Akira Otomo ◽  
Sonoko Otomo ◽  
Shiyoshi Yokoyama ◽  
Tatsuo Nakahama ◽  
Shinjo Mashiko
Keyword(s):  
Optical Properties ◽  
Laser Applications

X-ray absorption spectroscopy and density functional analysis of the Fe3+ distribution profile on Al sites in a chrysoberyl crystal, BeAl2O4:Fe3+

2016 ◽  
Vol 49 (2) ◽  
pp. 385-388 ◽  
Author(s):  
Kanokwan Kanchiang ◽  
Atipong Bootchanont ◽  
Janyaporn Witthayarat ◽  
Sittichain Pramchu ◽  
Panjawan Thanasuthipitak ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectroscopy ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Distribution Profile ◽  
Laser Applications ◽  
Edge Structure ◽  
X Ray ◽  
Site Distribution ◽  
X Ray Absorption

Chrysoberyl is one of the most interesting minerals for laser applications, widely used for medical purposes, as it exhibits higher laser performance than other materials. Although its utilization has been vastly expanded, the location of transition metal impurities, especially the iron that is responsible for chrysoberyl's special optical properties, is not completely understood. The full understanding and control of these optical properties necessitates knowledge of the precise location of the transition metals inside the structure. Therefore, synchrotron X-ray absorption spectroscopy (XAS), a local structural probe sensitive to the different local geometries, was employed in this work to determine the site occupation of the Fe3+ cation in the chrysoberyl structure. An Fe K-edge X-ray absorption near-edge structure (XANES) simulation was performed in combination with density functional theory calculations of Fe3+ cations located at different locations in the chrysoberyl structure. The simulated spectra were then qualitatively compared with the measured XANES features. The comparison indicates that Fe3+ is substituted on the two different Al2+ octahedral sites with the proportion 60% on the inversion site and 40% on the reflection site. The accurate site distribution of Fe3+ obtained from this work provides useful information on the doping process for improving the efficiency of chrysoberyl as a solid-state laser material.

Thermal and Optical Properties of Polyimide Films with Dispersed SWCNTs for Laser Applications

2017 ◽  
Vol 255 (1) ◽  
pp. 1700283 ◽  
Author(s):  
Der-Jang Liaw ◽  
Natalia R. Arutyunyan ◽  
Wei-Hung Chiang ◽  
Valentina A. Eremina ◽  
Elena P. Kharitonova ◽  
...  
Keyword(s):  
Optical Properties ◽  
Polyimide Films ◽  
Laser Applications

Preparation and optical properties of TeO 2 –BaO–ZnO–ZnF 2 fluoro-tellurite glass for mid-infrared fiber Raman laser applications

2017 ◽  
Vol 66 ◽  
pp. 567-572 ◽  
Author(s):  
Jie Li ◽  
Xusheng Xiao ◽  
Shaoxuan Gu ◽  
Yantao Xu ◽  
Zhiguang Zhou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Tellurite Glass ◽  
Raman Laser ◽  
Laser Applications ◽  
Mid Infrared

Optical Properties and Laser Applications of (InGa)As/(AlGa)As Self-Assembled Quantum Dots

2001 ◽  
Vol 40 (Part 1, No. 3B) ◽  
pp. 2077-2079 ◽  
Author(s):  
Mohamed Henini ◽  
Amalia Patanè ◽  
Antonio Polimeni ◽  
Laurence Eaves ◽  
Peter Main ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Laser Applications ◽  
Self Assembled
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