Authors: Lohrenz, Jan
Title: Aspects of charge carrier dynamics in Germanium and cadmium zinc telluride
Language (ISO): en
Abstract: This thesis addresses two markedly different aspects of ultrafast carrier dynamics in semiconductors in all-optical studies based on pump-probe measurements with femtosecond laser pulses. Both parts of the presented study aim to contribute to the fundamental understanding of the respective physical processes and to foster the applicability of the corresponding semiconductor systems in the context of spintronics, quantum computing, or all-optical switching. The first part of the present work provides an in-depth analysis of spin dynamics in the indirect semiconductor germanium. Founding on previously published work, the present study provides contributions to the understanding of the efficiency of the spin injection and readout process and their spectral dependencies, as well as the temporal limitations of the carrier spin ensemble coherence. The second part investigates the dynamical nonlinear optical response of the lower exciton-polariton branch in Cadmium Zinc Telluride. Motivated by the prospect of all-optical switching functionality, the question is addressed, to what extent the accompanying, highly nonlinear interaction induced by a high power laser pulse can be utilized to macroscopically manipulate the transmission of a second pulse on ultrashort time scales.
Subject Headings: Halbleiter
Ultraschnelle Spektroskopie
Semiconductors
Ultrafast spectroscopy
Lichtlineare Optik
Nonlinear optics
Spin
Spin
Exzitonen
Excitons
Exziton-Polaritonen
Exciton-polaritons
Germanium
CdZNTe
Subject Headings (RSWK): Germanium
Spin
Exziton
Laserspektroskopie
Nichtlineare Brechung
URI: http://hdl.handle.net/2003/35695
http://dx.doi.org/10.17877/DE290R-17726
Issue Date: 2016
Appears in Collections:Experimentelle Physik II

Files in This Item:
File Description SizeFormat 
Dissertation_Lohrenz.pdfDNB2.32 MBAdobe PDFView/Open


This item is protected by original copyright



All resources in the repository are protected by copyright.