Spectroscopic studies of dye-doped porous alumina membranes
Spectroscopic studies of dye-doped porous alumina membranes
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DOI：
10.1364/josab.35.001785
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发表时间：
2018-08-01
影响因子：
1.9
通讯作者：
Noginov, M. A.
中科院分区：
文献类型：
--
作者：
On, C.;Tanyi, E. K.;Noginov, M. A.
研究了罗丹明6G （R6G）染料分子浸渍纳米多孔氧化铝膜的光谱特性。当染料浓度较小时，反射率光谱有一个最小值，对应于R6G的吸收带。随着染料浓度的增加，反射率陡降一分为二，两个极小值之间的能量差增大。发射光谱带也具有类似的特性。我们解释这些观察在强耦合紧密位于通道内的染料分子。同时，实验观察到的反射光谱的角度依赖性与染料分子在染料浸渍通道阵列上的长期集体行为是一致的。(C) 2018年美国光学学会
We have studied the spectroscopic properties of nanoporous alumina membranes impregnated with rhodamine 6G (R6G) dye molecules. At small dye concentrations, the reflectance spectra feature one minimum, corresponding to the absorption band of R6G. With increase of the dye concentration, the reflectance dip splits in two and the energy difference between the two minima increases. A similar behavior is shared by the emission spectral band. We explain these observations in terms of strong coupling of closely situated dye molecules inside the channels. At the same time, the experimentally observed angular dependence of the reflectance spectrum is consistent with a long-range collective behavior of dye molecules across an array of dye-impregnated channels. (C) 2018 Optical Society of America