The J-band of organic dyes:: lineshape and coherence length
The J-band of organic dyes:: lineshape and coherence length
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DOI：
10.1016/s0301-0104(02)00594-3
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发表时间：
2002-07-15
期刊：
影响因子：
2.3
通讯作者：
Briggs, JS
中科院分区：
文献类型：
--
作者：
Eisfeld, A;Briggs, JS
染料分子的自组织 J 聚集体已有 60 多年的历史，目前正在成为用途广泛的量子系统，可应用于摄影、光电子学、太阳能电池、光生物学和超分子纤维。最近，人们在原子陷阱和量子点聚集体（用于量子计算）的纳米尺度上实现量子纠缠和相干性方面做出了很多努力。我们指出 J 聚集体的激子态是介观量子相干和纠缠的教科书案例。从字面上可以看到相干性的建立，因为由于吸收光谱的强烈变化，染料在聚集时显着改变颜色。在这里，我们用一个简单的理论重现了聚集成聚合物时光学吸收光谱的位移和形状，并计算了单体波函数的量子纠缠的相干长度。 (C) 2002 年由 Elsevier Science B.V. 出版。
Self-organised J-aggregates of dye molecules, known for over 60 years, are emerging as remarkably versatile quantum systems with applications in photography, opto-electronics, solar cells, photobiology and as supra-molecular fibres. Recently there has been much effort to achieve quantum entanglement and coherence on the nanoscale in atom traps and quantum dot aggregates (for use in quantum computing). We point out that the excitonic state of the J-aggregate is a text-book case of mesoscopic quantum coherence and entanglement. The establishment of coherence can literally be seen since the dye changes colour dramatically on aggregation due to strong shifts in the absorption spectrum. Here we reproduce in a simple theory the shifts and shapes of optical absorption spectra upon aggregation to a polymer and calculate the coherence length of quantum entanglement of monomer wavefunctions. (C) 2002 Published by Elsevier Science B.V..