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基于能量转移输出光覆盖可见光波段的高品质因数随机激光器

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

中文摘要英文摘要

基于混合染料中不同染料分子间的能量转移,本文在实验上实现了由单一波长泵浦的覆盖可见光波段的低阈值随机激光器。增益介质中,因为染料之间吸收光谱与荧光光谱有较宽的重叠范围,从而实现不同染料分子间的级联能量转移;作为散射体的金-银双金属多孔纳米线的多孔的表面结构使得其等离子共振谱在整个可见光波段连续而且变化很小,从而为不同的染料分子的受激发射提供了强反馈和增益。这种由混合染料作为增益介质的随机激光器可以实现由单一波长的激光泵浦激发得到不同波长的发射光,这为设计多种颜色的光输出设备提供了基础。

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.

王艳容、韦苏俊、孙彦彦、王兆娜、刘大禾、史晓玉、石锦卫、周静

光电子技术

随机激光,能量转移,多波长输出,低阈值

ascade energy transfer coherent random laser surface plasmon resonance bimetallic porous nanowires stimulated emission

王艳容,韦苏俊,孙彦彦,王兆娜,刘大禾,史晓玉,石锦卫,周静.基于能量转移输出光覆盖可见光波段的高品质因数随机激光器[EB/OL].(2013-11-25)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/201311-489.点此复制

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