Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 20: Poster IA (Ultrafast phenomena; Optical properties; Transport; Theory)
HL 20.5: Poster
Montag, 16. März 2015, 15:00–20:00, Poster B
Plasmon-Exciton coupling in stacked 2D Perovskite Semiconductors — •David Leipold1, Wendy Niu2, Lindsey Ibbotson2, G. Vijaya Prakash3, Jeremy J. Baumberg2, and Erich Runge1 — 1Technische Universität Ilmenau, Germany — 2University of Cambridge, UK — 3Indian Institute of Technology Delhi, India
The coupling of plasmons and non-linear materials is a vital part in the developement of future plasmonic devices. Strong coupling and the formation of new plasmon-exiton quasiparticles called Excimons was previously observed in metal-semiconductor hybrid systems and organic dye coated metal-gratings. Here, we discuss (C6H9C2H4NH3)2PbI4 (CHPI) as a candidate material for active plasmonic devices. In contrast to other materials, CHPI shows strong excitonic response and high stability even at room temperature. It can viably be processed from solution and forms regular stacks of semiconducting sheets. We present experiments and calculations for the optical properties of CHPI on nanostructured metal-gratings. We observe the formation of collective grating-exciton modes that are coupled with a Rabi splitting of 125-150meV. The role of the interaction of the CHPI exciton with its image-exciton in the metal is discussed as an additional interesting effect.