Research Areas
Our research concentrates on theoretical, numerical and experimental studies of wave propagation, light-matter interaction and nonlinear dynamics in optical systems.
Modell
Nanophotonics and Light-Matter Interaction
Modeling the field evolution in a nanolaser
Graphic: Ulf PeschelOur research in the field of nanophotonics is concentrated on metamaterials, photonic crystals and plasmonic structures. Modelling activities focus on the efficient simulation of wave propagation and light-matter interaction in semiconductor nanostructures based on finite-difference time-domain (FDTD) codes, rigorous coupled wave (RCWA) solvers and numerical implementations of the semiconductor Maxwell-Bloch equations.
A computer cluster including respective software and licenses is hosted and maintained in our group.
Exciton-Polaritons in Nanocavities
Formation and evolution of exciton-polaritons in nanoresonators
Graphic: Ulf PeschelA part of our modeling activities focuses on highly resonant semiconductor systems in which light is strongly coupled with excitons forming new bosonic quasiparticles. In close collaboration with several experimental groups, we simulate the dynamics and self-organization of these so-called exciton-polaritons including condensation, bistability and pattern formation.
Experiments on the Time Evolution of Optical Pulses in Fiber Systems
Pulse evolution in coupled fiber loops
Graphic: Ulf PeschelWe experimentally study the time evolution of optical pulses in a fiber system and realize discreteness and additional synthetic dimensions in the time domain. We observe the formation of one- and two-dimensional discrete temporal solitons, study the influence of gain and loss on parity-time (PT) symmetry, sudden phase transitions and unidirectional invisibility. For the first time, we measured the Berry curvature in an optical system, observed entanglement propagation, thermalization and superfluidity of light in an optical lattice.
