FLUORESCENCE PROPERTIES OF DYES ADSORBED TO SILVER-ISLANDS, INVESTIGATED BY PICOSECOND TECHNIQUES
FLUORESCENCE PROPERTIES OF DYES ADSORBED TO SILVER-ISLANDS, INVESTIGATED BY PICOSECOND TECHNIQUES
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DOI：
10.1007/bf00694696
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发表时间：
1985-01-01
期刊：
影响因子：
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通讯作者：
AUSSENEGG, FR
中科院分区：
文献类型：
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作者：
LEITNER, A;LIPPITSCH, ME;AUSSENEGG, FR
通过连续波和皮秒时间分辨方法研究了吸附在纯玻璃表面和银岛膜上的染料分子（罗丹明 6G 和赤藓红）的荧光特性。在纯玻璃表面上，我们观察到低于临界分子间距离的浓度猝灭（每个分子的荧光功率降低以及缩短和非指数荧光衰减）。在银岛薄膜上，荧光寿命的缩短更为剧烈，并且几乎与分子间距离无关。这种行为表明染料单体和金属颗粒中的等离子体激元之间存在电动相互作用，并通过染料二聚体的阻尼影响进行修改。
The fluorescence properties of dye molecules (rhodamine 6G and erythrosin) adsorbed on pure glass surfaces and on silver islands films are investigated by cw and picosecond time-resolved methods. On pure glass surfaces we observe concentration quenching below a critical intermolecular distance (reduction of the fluorescence power per molecule as well as shortened and non-exponential fluorescence decay). On silver islands films the shortening in fluorescence lifetime is more drastic and is nearly independent of the intermolecular distance. This behavior suggests an electrodynamic interaction between dye monomers and plasmons in the metal particles, modified by a damping influence of dye dimers.