Dr. Thomas Koprucki

Projects as a project leader

• OT7

  Model-based geometry reconstruction of quantum dots from TEM

  Dr. Thomas Koprucki / Dr. Karsten Tabelow

  Project heads: Dr. Thomas Koprucki / Dr. Karsten Tabelow
  Project members: Anieza Maltsi
  Duration: 01.06.2017 - 31.12.2018
  Status: completed
  Located at: Weierstraß-Institut
  

  Description

  Semiconductor quantum dots are nanostructures that form a technological path to innovative optoelectronic and photonic devices. Among them single quantum dots are promising candidates for single and entangled photon sources which are of importance for future quantum technologies such as quantum information processing, quantum cryptography, and quantum metrology. The growth of QDs with desired electronic properties would highly benefit from the assessment of QD geometry, distribution, and strain profile in a feedback loop between growth and analysis of their properties. In this project, we will therefore develop a novel 3D model-based geometry reconstruction (MBGR) of QDs. This will include an appropriate model for the QD configuration in real space, a characterization of corresponding simulated TEM images as well as a statistical procedure for the estimation of QD properties and classification of QD types based on acquired TEM image data. The MBGR approach will enable a high-throughput characterization of QD samples by TEM via QD geometry, distribution and strain field. Furthermore, it will provide a guiding example for mathematically enhanced microscopy for the reconstruction of other nanoscale objects in different applications.
  
  https://www.wias-berlin.de/projects/ECMath-OT7/

• 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/