Publikation: THz electromagnetic emission by coherent infrared-active phonons
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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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DEKORSY, 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.53.4005BibTex
@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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