Optical Response of Hybrid Plasmon鈥揈xciton Nanomaterials in the Presence of Overlapping Resonances

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• 作者：Maxim Sukharev ; Paul N. Day ; Ruth Pachter
• 刊名：ACS Photonics
• 出版年：2015
• 出版时间：July 15, 2015
• 年：2015
• 卷：2
• 期：7
• 页码：935-941
• 全文大小：563K
• ISSN：2330-4022

文摘

We consider a hybrid plasmon鈥揺xciton system comprising a resonant molecular subsystem and three Au wires supporting a dipole mode that can be coupled to a dark mode in controllable fashion by variation of a symmetry parameter. The physics of such a system under strong coupling conditions is examined in detail. It is shown that if two wires supporting the dark mode are covered with molecular layers, the system exhibits four resonant modes for a strong coupling regime due to asymmetry and lifted degeneracy of the molecular state in this case, while upon having molecular aggregates covering the top wire with a dipolar mode, three resonant modes appear. Pump鈥損robe simulations are performed to scrutinize the quantum dynamics and find possible ways to control plasmon鈥揺xciton materials. It is demonstrated that one can design hybrid nanomaterials with highly pronounced Fano-type resonances when excited by femtosecond lasers.