Organic Exciton in Strong Coupling with Long-Range Surface Plasmons and Waveguided Modes,ACS Photonics

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Organic Exciton in Strong Coupling with Long-Range Surface Plasmons and Waveguided Modes
ACS Photonics ( IF 6.5 ) Pub Date : 2017-08-29 00:00:00 , DOI: 10.1021/acsphotonics.7b00556
Kevin Chevrier ₁ , Jean-Michel Benoit ₁ , Clementine Symonds ₁ , Julien Paparone ₁ , Julien Laverdant ₁ , Joel Bellessa ₁

Affiliation

In this Letter, we demonstrate experimentally the strong interaction between organic semiconductor excitons and long-range surface plasmons. For this purpose, a thin J-aggregated cyanine dye layer is deposited on a thin silver film bounded by two poly(vinyl alcohol) layers. An anticrossing between the long-range surface plasmon and the dye exciton is measured in the dispersion relation and confirmed in luminescence experiments, showing unambiguously the hybridization between the long-range surface plasmon and the dye exciton. The extension of the polaritonic states deduced from the dispersion curves is 50 μm, which represents an increase of more than 1 order of magnitude compared to usual surface plasmon-based polaritons. We believe that the extension of the polariton coherence length can have direct applications to the energy transfer between molecules over long distances in strong coupling, as well as in the modification of the properties of materials (conductivity, second harmonic generation). Strong coupling between an aggregated dye layer and guided modes is also experimentally evidenced in a similar structure. The hybridization between dye exciton and guided modes demonstrated here opens the way to the exploitation of polariton nonlinearities and switching already evidenced in cavities for integrated optics: the strong coupling now occurs directly on the guided mode.

中文翻译：

有机激子与远程表面等离激元和波导模式的强耦合

在这封信中，我们通过实验证明了有机半导体激子与远程表面等离子体激元之间的强相互作用。为此，在由两个聚乙烯醇层界定的银薄膜上沉积一个J聚集的花菁染料薄膜。通过色散关系测量长距离表面等离子体激元和染料激子之间的反交，并在发光实验中证实，这清楚地显示了长距离表面等离子体激元和染料激子之间的杂交。由色散曲线推导出的极化子态的扩展为50μm，与常规的基于表面等离激元的极化子相比，增加了1个数量级。我们认为，极化子相干长度的扩展可以直接应用于强距离耦合中长距离分子之间的能量转移，以及材料性质的改变（电导率，二次谐波的产生）。聚集的染料层和引导模式之间的强耦合也以类似的结构在实验上得到证明。此处显示的染料激子和引导模式之间的杂交为极化子非线性的开发和集成光学器件腔中已经证明的转换开辟了道路：强耦合现在直接在引导模式下发生。聚集的染料层和引导模式之间的强耦合也以类似的结构在实验上得到证明。此处显示的染料激子和引导模式之间的杂交为极化子非线性的开发和集成光学器件腔中已经证明的转换开辟了道路：强耦合现在直接在引导模式下发生。聚集的染料层和引导模式之间的强耦合也以类似的结构在实验上得到证明。此处显示的染料激子和引导模式之间的杂交为极化光学非线性的开发和集成光学器件腔中已经证明的转换开辟了道路：强耦合现在直接在引导模式下发生。

更新日期：2017-08-29

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