A humidity-tailored film random laser is proposed and fabricated as a dye organic thin layer with Ag nanoflowers as plasmonic scatterers. By modifying the film's optical thickness with the surrounding humidity, the random lasing's wavelength and peak intensity are well regulated based on the waveguide feedback model. The peak wavelength is blue shifted from 575.18 nm to 568.43 nm and the peak intensity reduces from 3.97 × 10⁴ to 4.0 × 10³ a.u. when the air humidity changes from 18.0% to 71.4%, demonstrating the linear behaviors and better humidity sensitivity relative to that of the fluorescence, respectively. In addition, the fabricated random laser has a good time stability. These results may supply a new flexible way to design environment interaction random lasers and tailor their output performances, also promote their practical applications in the fields of smart sensing, internet of things, and environment monitoring.

提出了一种针对湿度的薄膜随机激光器，并将其制成染料有机薄层，并以Ag纳米花作为等离子体散射体。通过根据周围的湿度修改薄膜的光学厚度，可以基于波导反馈模型很好地调节随机激光的波长和峰值强度。峰值波长从575.18 nm蓝变到568.43 nm，峰值强度从3.97×10 ⁴减小到4.0×10 ³au，当空气湿度从18.0％变为71.4％时，分别显示出线性行为和相对于荧光的更好的湿度敏感性。另外，所制造的随机激光器具有良好的时间稳定性。这些结果可能为设计与环境相互作用的随机激光器提供新的灵活方式，并调整其输出性能，还可以促进其在智能传感，物联网和环境监测领域的实际应用。