PD Dr. Uwe Bandelow

Projects as a project leader

• OT2

  Turbulence and extreme events in non-linear optics

  PD Dr. Uwe Bandelow / Dr. M. Wolfrum

  Project heads: PD Dr. Uwe Bandelow / Dr. M. Wolfrum
  Project members: Dr Shalva Amiranashvili
  Duration: -
  Status: completed
  Located at: Weierstraß-Institut
  

  Description

  Many modern photonic devices show complex dynamical features in space and time resulting from optical nonlinearities in active, often nanostructured materials. The project is focussed specifically on high-dimensional dynamical regimes in optoelectronic systems. Such a complex spatio-temporal behavior, in which nearly all modes are excited, is characterized by the fact that, in contrast to e.g. solitons or pulsations, it cannot be reduced to a low-dimensional description in terms of classical bifurcation theory. This so-called optical turbulence can be observed both in a Hamiltonian and in a dissipative context. A mathematical treatment of the resulting multi-scale and multi-physics problems presents major challenges for modelling, numerical, and analytical investigations. A simulation of the mostly 2+1 dimensional PDE-systems requires efficient parallelization strategies, instability mechanisms can be described only in terms of amplitude equations, and multi-scale effects in complex device structures can lead to singularly perturbed dynamical problems.
  
  http://www.wias-berlin.de/projects/ECMath-OT2/project_OT2.jsp

• OT-AP1

  Multi-Dimensional Modeling and Simulation of Electrically Pumped Semiconductor-Based Emitters

  PD Dr. Uwe Bandelow / Dr. Thomas Koprucki / Prof. Dr. Alexander Mielke / Prof. Dr. Frank Schmidt

  Project heads: PD Dr. Uwe Bandelow / Dr. Thomas Koprucki / Prof. Dr. Alexander Mielke / Prof. Dr. Frank Schmidt
  Project members: -
  Duration: 01.01.2008 - 31.12.2019
  Status: running
  Located at: Weierstraß-Institut / Konrad-Zuse-Zentrum für Informationstechnik Berlin
  

  Description

  The aim of this joint project of WIAS and ZIB is the comprehensive and self-consistent optoelectronic modeling and simulation of electrically pumped semiconductor-based light emitters with spatially complex 3D device structure and quantum dot active regions. The required models and methods for an accurate representation of devices, such as VCSELs and single photon emitters, featuring open cavities, strong interactions between optical fields and carriers, quantum effects, as well as heating will be developed and implemented, resulting in a set of tools, that will be provided for our partners in the CRC 787.
  
  http://www.zib.de/projects/multi-dimensional-modeling-and-simulation-vertical-cavity-surface-emitting-lasers-vcsels http://wias-berlin.de/projects/sfb787-b4/