Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 68: Metal-Semiconductor Hybrids

HL 68.1: Hauptvortrag

Donnerstag, 10. März 2016, 09:30–10:00, H10

Modifications of material and chemical properties of organic molecules driven by QED phenomena — •Francisco Garcia-Vidal — Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, Madrid 28049 (Spain)

In this talk we will show how some material and chemical properties of molecules can be tuned and modified by taking advantage of the phenomenon of collective strong coupling. First we will show how exciton conductance in organic materials can be enhanced by several orders of magnitude when the molecules are strongly coupled to an EM confined mode [1]. We furthermore show that by designing the electric field profile of the EM mode that provides the strong coupling, the transport properties can be tuned to achieve exciton harvesting and funneling, i.e., to guide excitons from a collection area to a specific location [2]. Finally, we analyze under which conditions the molecular properties under strong coupling can be understood by the modification of the potential energy surfaces determining nuclear dynamics under the Born-Oppenheimer approximation. In addition, we demonstrate that the nuclear dynamics of the molecules in electronic dark states, which are only weakly coupled to the EM mode, are nonetheless affected by the formation of collective strong coupling [3].

[1] J. Feist and F. J. Garcia-Vidal, Phys. Rev. Lett. 114, 196402 (2015). [2] C. Gonzalez-Ballestero, J. Feist, Esteban Moreno, and F. J. Garcia-Vidal, Phys. Rev. B 92, 121402(R) (2015). [3] J. Galego, F. J. Garcia-Vidal, and J. Feist, Phys. Rev. X 5, 041022 (2015).