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Proceedings Paper

Coherent acoustic phonons in nanostructures investigated by asynchronous optical sampling
Author(s): T. Dekorsy; F. Hudert; R. Cerna; H. Schäfer; C. Janke; A. Bartels; K. Köhler; S. Braun; M. Wiemer; S. Mantl
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Paper Abstract

A new optical pump-probe technique is implemented for the investigation of acoustic phonon dynamics in the GHz to THz frequency range which is based on two asynchronously linked femtosecond lasers. Asynchronous optical sampling (ASOPS) provides the performance of on all-optical oscilloscope and allows us to record optically induced lattice dynamics over nanosecond times with 200 femtoseconds resolution at scan rates of 10 kHz. The generation of coherent acoustic phonons and their propagation and decay dynamics are investigated in semiconductor heterostructures, layered nanoscale materials of relevance for microelectronics, and X-ray mirrors. Changes of the optical properties of tailored semiconductor heterostructures associated with coherent phonon dynamics open the pathway for the modulation of optical signals at up to THz frequencies.

Paper Details

Date Published: 2 October 2006
PDF: 11 pages
Proc. SPIE 6393, Nanophotonics for Communication: Materials, Devices, and Systems III, 63930H (2 October 2006); doi: 10.1117/12.687052
Show Author Affiliations
T. Dekorsy, Univ. Konstanz (Germany)
F. Hudert, Univ. Konstanz (Germany)
R. Cerna, Univ. Konstanz (Germany)
H. Schäfer, Univ. Konstanz (Germany)
C. Janke, Univ. Konstanz (Germany)
Gigaoptics GmbH (Germany)
A. Bartels, Univ. Konstanz (Germany)
Gigaoptics GmbH (Germany)
K. Köhler, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
S. Braun, Fraunhofer-Institut für Werkstoff- und Strahltechnik (Germany)
M. Wiemer, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration (Germany)
S. Mantl, Institut für Bio- und Nano-systeme (Germany)

Published in SPIE Proceedings Vol. 6393:
Nanophotonics for Communication: Materials, Devices, and Systems III
Martina Gerken; Nibir K. Dhar; Achyut K. Dutta; M. Saif Islam, Editor(s)

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