Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Focus: Functional Polymer Hybrids I

CPP 20.6: Hauptvortrag

Dienstag, 8. März 2016, 11:15–11:45, H51

Plasmon coupling in self-assembled colloidal monolayers — •Matthias Karg — Physical Chemistry I, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany

Organized nanoscale structures which can guide or manipulate the propagation of electromagnetic fields at optical frequencies are of great importance for applications in sensing, all-optical computing and photovoltaics. While such structures are typically created by lithographic approaches, the realization of optically functional superstructures through bottom-up assembly of colloidal building blocks remains challenging. In this contribution I will report on our latest results of using wet-chemically synthesized plasmonic colloids, their assembly into highly periodic superstructures as well as their optical performance. Structural control is achieved by using polymer encapsulation strategies which allow us to tune inter-particle interactions[1]. Different methods for 2D assembly will be presented yielding isotropic as well as anisotropic particle arrays of high order[2]. Long-range dipolar plasmon resonance coupling is observed for assemblies with extraordinarily high degrees of order[3]. The enhanced Q-factors of these coupled arrays are promising for low-threshold plasmonic lasing.

[1] A. Rauh, T. Honold, M. Karg, Colloid Polym Sci 2015, DOI: 10.1007/s00396-015-3782-6 [2] T. Honold, K. Volk, A. Rauh, J.P.S. Fitzgerald, M. Karg, J. Mater. Chem. C 2015, 3, 11449-11457 [3] K. Volk, J.P.S. Fitzgerald, M. Retsch, M. Karg, Adv. Mater. 2015, DOI: 10.1002/adma.201503672