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Coherent and ultrafast optoelectronics in III–V semiconductor compounds
Author(s) -
Först M.,
Nagel M.,
Awad M.,
Wächter M.,
Dekorsy T.,
Kurz H.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200675615
Subject(s) - ultrashort pulse , dephasing , femtosecond , picosecond , optoelectronics , semiconductor , terahertz radiation , context (archaeology) , femtochemistry , materials science , laser , physics , optics , condensed matter physics , paleontology , biology
III–V compound semiconductors offer a fascinating multitude of phenomena which have become accessible via ultrafast time‐resolved spectroscopy. Coherent vibronic and electronic dynamics are prepared by excitation with taylored femtosecond laser pulses. The analysis of their temporal dephasing or decay provides deep insights into the interaction between electronic and vibronic degrees of freedem and the surrounding bath in high purity quantum structures. In contrast to coherent electronic or vibronic states, deliberately introduced growth defects can be used to drastically shorten the lifetime of optically excited carriers. Sub‐picosecond carrier lifetimes open the possibility to realize ultrafast saturable absorbers and optoelectronic transducer elements. They are particularly important as key elements in THz technology, such as efficient THz emitters, detectors, and for on‐chip THz technology. This paper summarizes the most distinguished results relevant in the context of ultrafast optoelectronics and THz technology obtained in close collaboration with the Paul‐Drude‐Institute Berlin over the past decade. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)