Extreme THz nonlinearities in bulk and nanostructured semiconductors

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2010
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Kampfrath, Tobias
von Volkmann, Konrad
Steiner, Johannes T.
Kira, Mackillo
Koch, Stephan W.
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SONG, Jin-Joo, ed. and others. Ultrafast phenomena in semiconductors and nanostructure materials XIV : 24 - 27 January 2010, San Francisco, California, United States. Bellingham, Washington.: SPIE, 2010, 76001S. Proceedings of SPIE. 7600. eISSN 0277-786X. ISBN 978-0-8194-7996-9. Available under: doi: 10.1117/12.840959
Zusammenfassung

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.

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Ultrafast phenomena in semiconductors and nanostructure materials XIV, 24. Jan. 2010 - 27. Jan. 2010, San Francisco, California
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ISO 690SELL, Alexander, Aji A. ANAPPARA, Tobias KAMPFRATH, Konrad VON VOLKMANN, Martin WOLF, Johannes T. STEINER, Mackillo KIRA, Stephan W. KOCH, Alfred LEITENSTORFER, Rupert HUBER, 2010. Extreme THz nonlinearities in bulk and nanostructured semiconductors. Ultrafast phenomena in semiconductors and nanostructure materials XIV. San Francisco, California, 24. Jan. 2010 - 27. Jan. 2010. In: SONG, Jin-Joo, ed. and others. Ultrafast phenomena in semiconductors and nanostructure materials XIV : 24 - 27 January 2010, San Francisco, California, United States. Bellingham, Washington.: SPIE, 2010, 76001S. Proceedings of SPIE. 7600. eISSN 0277-786X. ISBN 978-0-8194-7996-9. Available under: doi: 10.1117/12.840959
BibTex
@inproceedings{Sell2010-02-15Extre-53881,
  year={2010},
  doi={10.1117/12.840959},
  title={Extreme THz nonlinearities in bulk and nanostructured semiconductors},
  number={7600},
  isbn={978-0-8194-7996-9},
  publisher={SPIE},
  address={Bellingham, Washington.},
  series={Proceedings of SPIE},
  booktitle={Ultrafast phenomena in semiconductors and nanostructure materials XIV : 24 - 27 January 2010, San Francisco, California, United States},
  editor={Song, Jin-Joo},
  author={Sell, Alexander and Anappara, Aji A. and Kampfrath, Tobias and von Volkmann, Konrad and Wolf, Martin and Steiner, Johannes T. and Kira, Mackillo and Koch, Stephan W. and Leitenstorfer, Alfred and Huber, Rupert},
  note={Article Number: 76001S}
}
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