Computational Optoelectronics and Photonics

Research

We are interested in the optical, electronic and quantum optical properties of different material systems, which we analyse by microscopic theory and numerical simulations. For example, we investigate situations in which matter is excited by very short laser pulses. This allows us to study in detail ultrafast dynamical processes that occur on time scales of a few femtoseconds (1 fs = 10^-15 s) or even in the range of attoseconds (1 as = 10^-18 s). Nonlinearities resulting from the interaction with very intense light pulses can drastically change the optical properties. Besides purely optical processes, optically induced transport phenomena are also of great interest. Furthermore, a strong focus is on investigating interactions with quantum light, which sheds new light on the fundamentals of the interaction between light and matter and is very promising for various applications in quantum technology.

Team

We are a diverse international team working on the different topics and projects.

Publications

See complete list in our Research Information System
see also ORCID profile and google scholar profile of Torsten Meier

Selected recent publications

Microscopic approach to the quantized light-matter interaction in semiconductor
nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons,
H. Rose, S. Schumacher, and T. Meier,
arXiv:2506.22220 [cond-mat.mes-hall] & Phys. Rev. B, accepted.

Unexpected increase of intensity-dependent excitonic second- and third-harmonic generation induced by static electric fields,
R. Zuo, M. Reichelt, C. Ngo, X. Song, W. Yang, and T. Meier,
arXiv:2511.05112 [cond-mat.mes-hall]

Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation,
D. A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, and P. R. Sharapova,
Physical Review Research 7, 033122 (2025)

Multiphoton, multimode state classification for nonlinear optical circuits,
D. A. Kopylov, C. Offen, L. Ares, B. Wembe Moafo, S. Ober-Blöbaum, T. Meier, P. R. Sharapova, and J. Sperling,
Physical Review Research 7, 033062 (2025)

Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides,
D. A. Kopylov, T. Meier, and P. R. Sharapova,
arXiv.2506.09587 [quant-ph]

Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling,
U. Ali, M. Holthaus, and T. Meier,
Phys. Rev. Research 7, 013141 (2025)

Theory of Multimode Squeezed Light Generation in Lossy Media,
D. A. Kopylov, T. Meier, and P. R. Sharapova,
Quantum 9, 1621 (2025)

Projects

Two projects in the DFG TRR 142/3 Tailored nonlinear photonics:
From fundamental concepts to functional structures:
A02 "Nonlinear spectroscopy of semiconductor nanostructures with quantum light" (Akimov (TU Dortmund), Meier);
A10 "Nonlinear strong-field dynamics of atomically thin transition metal dichalcogenides" (Lange & Ruppert (TU Dortmund), Meier).

A complete list of projects is available in the project database

Netzwerke

NEWS

Successful PhD defense of Dr. Usman Ali

On April 30th, 2025, Dr. Usman Ali successfully defended his thesis “Quantum dynamics in parametrically driven one-dimensional optical lattices”. Congratulations, well done, and all the best for Oldenburg, Usman!

Dr. Ruixin Zuo successfully defended her PhD

On March 25th, 2025, Dr. Ruixin Zuo presented the results of her thesis “Microscopic investigations of light induced harmonic generation: Ultrafast carrier dynamics and excitonic effects” and successfully passed the oral examination of the committee. Congratulations and well done, Ruixin!

Successful PhD defense of Dr. Cong Thanh Ngo

On February 18, 2025, Dr. Cong Thanh Ngo successfully defended his dissertation on:
“Microscopic Analysis of the Nonlinear Optical Properties of Semiconductor Quantum Well Structures: Excitonic Anomalous Currents and Many-Body Correlations of Charge-Transfer Excitons”. Well done & Congratulations, Cong!