Title :
Investigation of coherent acoustic phonons in THz quantum cascade laser structures
Author :
Hettich, M. ; Bruchhausen, A. ; Lloyd-Hughes, J. ; Gebs, R. ; Bartels, A. ; Fischer, M. ; Beck, M. ; Scalari, G. ; Faist, J. ; Dekorsy, T.
Author_Institution :
Dept. of Phys., Univ. Konstanz, Konstanz, Germany
Abstract :
Coherent zone folded acoustic phonons in terahertz quantum cascade laser (QCL) structures are investigated by high-speed asynchronous optical sampling. This method is based on two Ti:sapphire lasers with repetition rates of ~1 GHz respectively. The time delay between pump and probe pulse is achieved by an offset in repetition rate of 5kHz. This allows for fast scanning times without moving mechanical parts.
Keywords :
delays; phonons; quantum cascade lasers; sapphire; solid lasers; titanium; Al2O3:Ti; THz quantum cascade laser structures; Ti:sapphire lasers; coherent zone folded acoustic phonons; high-speed asynchronous optical sampling; probe pulse; terahertz quantum cascade laser structures; time delay;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
DOI :
10.1109/CLEOE.2011.5942865
