Effect of nonlocal metal-dielectric environments on concentration quenching of HITC dye
Effect of nonlocal metal-dielectric environments on concentration quenching of HITC dye
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DOI：
10.1364/josab.36.003579
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发表时间：
2019-12-01
影响因子：
1.9
通讯作者：
Noginov, Mikhail A.
中科院分区：
文献类型：
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作者：
Prayakarao, Srujana;Koutsares, Samantha R.;Noginov, Mikhail A.
了解和利用有机和无机系统中的能量转移具有非常重要的基础和实际意义。在这项工作中，我们通过实验研究了层状双曲超材料和金属/电介质界面对掺杂有掺杂的薄聚合聚（甲基丙烯酸甲酯）薄膜中浓度依赖性发光猝灭的影响。 2-[7-(1,3-二氢-1,3,3-三甲基-2H-吲哚-2-亚基)-1,3,5-庚三烯基]-1,3,3-三甲基-3H-吲哚碘化物染料分子。发现浓度猝灭速率（能量转移到猝灭中心）大约与染料浓度的平方成正比。在具有双曲色散的金属薄膜和层状金属介电超材料附近，浓度猝灭受到强烈抑制。发现抑制的特征长度尺度（抑制变得显着的染料分子与金属表面之间的距离）类似于 47 nm。它比福斯特半径（供体-受体能量转移的特征距离，5 nm至7 nm）长得多，并且小于表面等离子体激元场对电介质的穿透（>= 250 nm）。对所观察到的现象的解释可能会根据模型来寻求，该模型考虑了供体发射和受体吸收的光谱重叠和/或发射器与表面等离子体激元耦合的集体行为。 (C) 2019 美国光学学会
Understanding and harnessing energy transfer in organic and inorganic systems is of high fundamental and practical importance. In this work, we have experimentally studied the effect of lamellar hyperbolic metamaterials and metal/dielectric interfaces on the concentration-dependent luminescence quenching in thin polymeric poly (methyl methacrylate) films doped with 2-[7-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indoliumiodide dye molecules. The rate of the concentration quenching (energy transfer to quenching centers) was found to be approximately proportional to the square of the dye concentration. The concentration quenching was strongly inhibited in the vicinity of metallic films and lamellar metal-dielectric metamaterials with hyperbolic dispersion. The characteristic length-scale of the inhibition (the distance between the dye molecules and the metallic surface, at which the inhibition becomes significant) was found to be similar to 47 nm. It was much longer than the Forster radius (the characteristic distance of the donor-acceptor energy transfer, 5 nm to 7 nm), and smaller than the penetration of the surface plasmon polariton field to the dielectric (>= 250 nm). The explanation of the observed phenomenon is likely to be sought in terms of a model taking into account spectral overlap of the emission of donors and absorption of acceptors and/or collective behavior of emitters coupled with surface plasmons. (C) 2019 Optical Society of America