Regensburg 2019 – wissenschaftliches Programm
CPP 66.1: Hauptvortrag
Freitag, 5. April 2019, 09:45–10:15, H18
Coupled Organic-Inorganic Nanostructures for Optical Switches — •Marcus Scheele — Universität Tübingen, Tübingen, Deutschland
Optical switches are key components for data processing on the basis of silicon photonics, in which they perform the crucial conversion of a photonic information from an optical fiber into an electric information for a silicon-based processing unit. The status of the switch is controlled by an external light source, emitting at a wavelength suitable to be absorbed by the conductive channel to photo-induce additional charge carriers and modulate the current output of the switch in close analogy to a classic transistor. This presentation details how hybrid superlattices of semiconducting nanocrystals and organic pi-systems with long-range order are applied as active layers in functional optical switches. The particular novelty for optical switching is an activated absorption mechanism, in which stimulation with one optical signal sensitizes the material towards an amplified recognition of a second optical stimulus. Several examples with different material combinations are presented and the importance of exciton formation as well as charge transfer across the inorganic-organic interface is discussed.