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Proceedings Paper

Random lasing from a colloidal gain medium with urchin-like TiO2 structures
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Paper Abstract

We report our results on random lasing from rhodamine 6G based colloidal gain medium consisting of urchin-like TiO2 structures. Multimode behaviour is observed even at low pump laser powers. Emission linewidth narrowing and lasing threshold are investigated. Coherent back scattering is used to obtain the disorder degree of the sample. This urchin based system is demonstrated to possess lower lasing thresholds and enhanced efficiency with multimode behaviour compared to a TiO2 spherical particle system with same disorder degree. This work opens up a new avenue for low threshold, high efficiency lasing.

Paper Details

Date Published: 16 September 2016
PDF: 7 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 99200G (16 September 2016); doi: 10.1117/12.2236335
Show Author Affiliations
Venkata Siva Gummaluri, Indian Institute of Technology Madras (India)
Radhika V. Nair, Indian Institute of Technology Madras (India)
Vijayan C., Indian Institute of Technology Madras (India)


Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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