Tailored ultrafast acoustics for light emission modulation (A06)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 231447078

The interaction of coherent acoustic phonons and excitons in low-dimensional semiconductor structures is in the focus of this project proposal. In the experiments, picosecond strain pulses are sent through the nanostructure. The response on the ultrafast acoustic impact is monitored through the light emission and tailored by nanoscale adjustment of the optical and elastic properties. In the next funding period, we aim at challenging goals, namely to achieve quantum efficiency in counting acoustic phonons using exciton polaritons in a multi-quantum-well structure, to obtain spatially distributed switching of a bi-stable polariton condensate in a microcavity, and to detect modulation of the exciton resonances in transition metal dichalcogenides heterostructures.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 142: Tailored nonlinear photonics: From fundamental concepts to functional structures
• Applicant Institution: Universität Paderborn
• Project Heads: Professor Dr. Donat Josef As, until 12/2017; Professor Dr. Manfred Bayer; Professor Dr. Dirk Reuter; Alexey Scherbakov, Ph.D., since 1/2022