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THz electromagnetic emission by coherent infrared-active phonons

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1996

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Auer, Holger
Bakker, Huib J.
Roskos, Hartmut G.
Kurz, Heinrich

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Physical Review B. 1996, 53(7), pp. 4005-4014. Available under: doi: 10.1103/PhysRevB.53.4005

Zusammenfassung

Coherent phonons are excited in single-crystal tellurium by above-band-gap excitation with femtosecond laser pulses. Coherent infrared-active lattice vibrations give rise to the emission of electromagnetic waves at the phonon frequency. The excitation mechanism is based on the ultrafast buildup of a photo-Dember field and the coupling of a polar lattice mode to this field. The dynamics of the Dember field is obtained from a numerical simulation of the electron-hole plasma dynamics close to the crystals surface. This effect itself gives rise to a broadband emission of THz radiation from highly absorbing semiconductor surfaces. Details of the generation and the outcoupling of the radiation are discussed.

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530 Physik

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ISO 690DEKORSY, Thomas, Holger AUER, Huib J. BAKKER, Hartmut G. ROSKOS, Heinrich KURZ, 1996. THz electromagnetic emission by coherent infrared-active phonons. In: Physical Review B. 1996, 53(7), pp. 4005-4014. Available under: doi: 10.1103/PhysRevB.53.4005
BibTex
@article{Dekorsy1996elect-5257,
  year={1996},
  doi={10.1103/PhysRevB.53.4005},
  title={THz electromagnetic emission by coherent infrared-active phonons},
  number={7},
  volume={53},
  journal={Physical Review B},
  pages={4005--4014},
  author={Dekorsy, Thomas and Auer, Holger and Bakker, Huib J. and Roskos, Hartmut G. and Kurz, Heinrich}
}
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