Random lasing with high quality factor over whole visible range based on cascade energy transfer

Shi Xiaoyu; Wang Yanrong; Wang Zhaona; Sun Yanyan; Wei Sujun; Liu Dahe; Zhou Jing; Shi Jinwei

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Random lasing with high quality factor over whole visible range based on cascade energy transfer

Shi Xiaoyu 1,Wang Yanrong 1,Wang Zhaona 1 * #,Sun Yanyan 1,Wei Sujun 1,Liu Dahe 2,Zhou Jing 1,Shi Jinwei 1

1.Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China.

2.Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China.Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hang Kong University, Nanchang 330063, China.

*Correspondence author

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Funding: none

Opened online:25 November 2013

Accepted by: none

Citation: Shi Xiaoyu,Wang Yanrong,Wang Zhaona.Random lasing with high quality factor over whole visible range based on cascade energy transfer[OL]. [25 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4570654

On the basis of cascade energy transfer between different dye molecules, single-excitation and low threshold coherent random lasing with a high quality factor (~13000) over the whole visible range was experimentally observed using gold-silver bimetallic porous nanowires with abundant nano-gaps as the scatterers. These nano-gaps with different sizes in the bimetallic nanowires can produce continuous plasmonic resonance spectra and provide strong feedback or gain channels for the stimulated emission from different dye molecules. It guarantees low threshold of lasing. Moreover, multi gain media can provide broad tunability of the emission wavelength when the system is pumped by single-wavelength pulses. It provides excellent flexibility for the design of multi-color output device.

Keywords:Cascade energy transfer, coherent random laser, surface plasmon resonance, bimetallic porous nanowires, stimulated emission

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