Chang Shu-Han, Wu Jin-Jei, Kuo Chi-Ching, Tsay Shwu-Yun, Chen Yao-Hui, Lin Ja-Hon
Opt Lett. 2020 Sep 15;45(18):5144-5147. doi: 10.1364/OL.398793.
Plasmonic random lasers have been demonstrated in combining dye-doped cholesteric liquid crystals (DD-CLCs) and silver nanoparticles (AgNPs). The DD-CLC laser reveals the lowest threshold and highest slope efficiency through the localized surface plasmon resonance of AgNPs with the best coupling of the emission spectrum of lasing dye and resonance of electron oscillation on the metal surface. Thermal control of the DD-CLC lasers has been achieved to simultaneously shift the long- and short-edge lasing peaks. By the -stable analysis, the DD-CLC random laser (RL) reveals heavy tail distribution with relatively low ∼1.06 to show the Lévy behavior. Owing to its low spatial coherence, the DD-CLC RL has been demonstrated to produce a speckle-reduced image with a lower contrast of about 0.04.
通过将染料掺杂胆甾相液晶（DD-CLC）与银纳米颗粒（AgNP）相结合，已证明了等离子体随机激光器。DD-CLC激光器通过AgNP的局域表面等离子体共振，实现了最低阈值和最高斜率效率，同时实现了激光染料发射光谱与金属表面电子振荡共振的最佳耦合。已实现对DD-CLC激光器的热控制，以同时移动长波和短波激射峰。通过稳定性分析，DD-CLC随机激光器（RL）显示出重尾分布，相对较低约为1.06，表现出 Lévy 行为。由于其低空间相干性，已证明DD-CLC RL能够产生对比度约为0.04的低散斑图像。
