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

被引：6
作者：
Gummaluri, Venkata Siva [1 ]
Nair, Radhika V. [1 ]
Vijayan, C. [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Photon Lab, Madras 600036, Tamil Nadu, India
来源：
ACTIVE PHOTONIC MATERIALS VIII | 2016年 / 9920卷
关键词：
Random lasing; urchin-like structures; multimode emission; low threshold; incoherent lasing; non-resonant feedback; microspheres;
D O I：
10.1117/12.2236335
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report our results on random lasing from rhodamine 6G based colloidal gain medium consisting of urchin-like TiO2 tructures. 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.
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页数：7
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