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Proceedings Paper

Extreme THz nonlinearities in bulk and nanostructured semiconductors
Author(s): A. Sell; A. A. Anappara; T. Kampfrath; K. von Volkmann; M. Wolf; J. T. Steiner; M, Kira; S. W. Koch; G. Biasiol; L. Sorba; A. Tredicucci; A. Leitenstorfer; R. Huber
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Paper Abstract

Phase-locked electromagnetic transients in the terahertz (THz) spectral domain have become a unique contact-free probe of the femtosecond dynamics of low-energy excitations in semiconductors. Access to their nonlinear response, however, has been limited by a shortage of sufficiently intense THz emitters. Here we introduce a novel high-field source for THz transients featuring peak amplitudes of up to 108 MV/cm. This facility allows us to explore the non-perturbative response of semiconductors to intense fields tailored with sub-cycle precision. In a first experiment intense transients drive Rabi-oscillations between excitonic states in Cu2O, implying exciting perspectives for future THz quantum optics. At electric fields beyond 10 MV/cm, we observe the breakdown of the power expansion of the nonlinear polarization in bulk semiconductors. Furthermore, we employ the intense magnetic field components of our transients to coherently control spin waves in antiferromagnetically ordered solids. Finally, intersubband cavity polaritons in semiconductor microcavities are exploited to push light-matter coupling to an unprecedented ultrastrong and sub-cycle regime.

Paper Details

Date Published: 1 March 2010
PDF: 8 pages
Proc. SPIE 7600, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, 76001S (1 March 2010); doi: 10.1117/12.840959
Show Author Affiliations
A. Sell, Univ. of Konstanz (Germany)
A. A. Anappara, Univ. of Konstanz (Germany)
T. Kampfrath, Freie Univ. Berlin (Germany)
K. von Volkmann, Freie Univ. Berlin (Germany)
M. Wolf, Freie Univ. Berlin (Germany)
J. T. Steiner, Univ. Marburg (Germany)
M, Kira, Univ. Marburg (Germany)
S. W. Koch, Univ. Marburg (Germany)
G. Biasiol, Lab. Nazionale TASC, CNR-INFM (Italy)
L. Sorba, Lab. Nazionale TASC, CNR-INFM (Italy)
Lab. NEST, CNR-INFM, Scuola Normale Superiore di Pisa (Italy)
A. Tredicucci, Lab. NEST, CNR-INFM, Scuola Normale Superiore di Pisa (Italy)
A. Leitenstorfer, Univ. of Konstanz (Germany)
R. Huber, Univ. of Konstanz (Germany)

Published in SPIE Proceedings Vol. 7600:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV
Jin-Joo Song; Kong-Thon Tsen; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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