Skip navigation
SuUB logo
DSpace logo

  • Home
  • Institutions
    • University of Bremen
    • City University of Applied Sciences
    • Bremerhaven University of Applied Sciences
  • Sign on to:
    • My Media
    • Receive email
      updates
    • Edit Account details

Citation link: http://nbn-resolving.de/urn:nbn:de:gbv:46-00104102-10
00104102-1.pdf
OpenAccess
 
copyright

Licht-Materie-Wechselwirkung in Halbleiter-Nanostrukturen zur Erzeugung nichtklassischen Lichts und stimulierter Emission


File Description SizeFormat
00104102-1.pdf3.6 MBAdobe PDFView/Open
Other Titles: Theory for light-matter interaction in semiconductor nanostructures and their use as sources of nonclassical light and stimulated emission
Authors: Florian, Matthias 
Supervisor: Jahnke, Frank
1. Expert: Jahnke, Frank
2. Expert: Wehling, Tim
Abstract: 
The framework of quantum optics was developed side by side with groundbreaking experiments involving lasers and atoms as active medium. The amount of control one nowadays has on the design of semiconductor nanostructures is constantly leading to new progress in this field, and we can use quantum dots (QDs) that possess atom-like discrete states as emitters instead. With a single QD in a high-quality cavity with three-dimensional mode confinement, the ultimate limit of miniaturization is reached, where one electronic transition interacts with a single mode of the electromagnetic field. The application potential of this system lies in efficient light sources, new devices for quantum information technologies, as well as in highly tunable platforms to perform fundamental studies in the field of semiconductor quantum optics. We investigate the characteristics of microcavity lasers with single QD gain and discuss the possibility to realize stimulated emission in the strong-coupling regime. The impact of non-resonant background emitters present in experimental realizations is addressed, where off-resonant coupling between emitter resonances and the cavity mode is enabled via phonons or additional carriers in delocalized states. Furthermore, new schemes for electrically driven single-photon sources and the generation of polarization-entangled photons are proposed. Our theoretical analysis is based on microscopic theories going beyond simple atomic models. This allows us to investigate many-body effects and incorporates carrier-photon correlations, providing direct access to the statistical properties of the emission. The dynamical evolution of the system is described by means of density matrix approaches, or relies on cumulant expansion techniques where the first is numerically not possible. Multi-exciton effects of the quantum dot carriers play an important role, as well as the coupling to continuum states of the embedding material.
Keywords: semiconductor quantum dots, open quantum systems, excitons, correlations, quantum kinetics, microcavity lasers, photon statistics, nonresonant cavity-quantum dot coupling, nonclassical light sources
Issue Date: 17-Nov-2014
Type: Dissertation
URN: urn:nbn:de:gbv:46-00104102-10
Institution: Universität Bremen 
Faculty: FB1 Physik/Elektrotechnik 
Appears in Collections:Dissertationen

  

Page view(s)

29
checked on Jan 19, 2021

Download(s)

6
checked on Jan 19, 2021

Google ScholarTM

Check


Items in Media are protected by copyright, with all rights reserved, unless otherwise indicated.

Legal notice -Feedback -Data privacy
Media - Extension maintained and optimized by Logo 4SCIENCE