Ultrafast dynamics of light-matter-coupling processes in functionalized semiconductor nanowire structrures

Applicants Professor Dr. Jürgen Gutowski; Professor Dr. Tobias Voß
Subject Area Experimental Condensed Matter Physics
Electronic Semiconductors, Components and Circuits, Integrated Systems, Sensor Technology, Theoretical Electrical Engineering
Term from 2012 to 2019
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 186128001
 

Project Description

„The goal of this project is to use femtosecond laser spectroscopy to study the dynamics of the processes occurring between semiconductor nanowires, their functionalized surfaces and the surrounding medium. We will apply different spectroscopy techniques to address the different time scales on which these processes are expected to happen. Two-color pump-probe transmission spectroscopy will allow studying polariton amplification in nanowire/Bragg structures as well as energy and electron transfer processes between nanowires and attached organic layers. Spectrally and time-resolved photoluminescence measurements on a ps to ms time scale will be used to clarify the dynamics of the excitation channels and decay pathways in nanowire/transition-metal or nanowire/rare-earth systems as well as nanowire LED structures. The results are expected to provide information about excited-state lifetimes and channels/pathways through which energy and electrons are exchanged between the different components of the functionalized nanowire structures. Further, the question will be addressed how surface and environment affect the electronic band structure in the nanowire surface region.“
DFG Programme Research Units
Subproject of FOR 1616:  Dynamics and Interactions of Semiconductor Nanowires for Optoelectronics