荧光染料掺杂DNA-CTMA薄膜的放大自发辐射特性

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采用旋涂法制备了若丹明6G(Rh6G)和若丹明B(RhB)两种染料掺杂的DNA-CTMA复合薄膜,并通过对薄膜的表面形貌、紫外/可见/红外吸收光谱、荧光光谱特性的测量,表征了薄膜的成膜质量及光谱特性。通过NdYAG脉冲激光器的倍频光激发,研究了不同比例荧光染料掺杂DNA-CTMA薄膜的放大自发辐射(ASE)现象并做了理论解释。实验结果表明,在波长为532 nm的脉冲激光抽运下,Rh6G/RhB/DNA-CTMA薄膜的发射谱出现了明显的窄化现象,而且比单一染料掺杂DNA-CTMA薄膜的发射谱呈现出较大的光谱调谐范围,是一种较好的有机聚合物激光材料体系。
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