Nonlinear THz optics-ultrafast spectroscopy
Our recent development of a simple and reliable method to generate THz pulses with high electric field amplitudes has paved the way for nonlinear optics in the THz regime. We report on two experiments on n-type GaAs, which are in strong contrast to the predictions of Drude theory, (i) nonlinear prop...
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| creator | Woerner, M. Gaal, P. Kuehn, W. Reimann, K. Elsaesser, T. Hey, R. |
| description | Our recent development of a simple and reliable method to generate THz pulses with high electric field amplitudes has paved the way for nonlinear optics in the THz regime. We report on two experiments on n-type GaAs, which are in strong contrast to the predictions of Drude theory, (i) nonlinear propagation of intense THz pulses through a thin n-type GaAs layer shows a coherent emission at 2 THz with a picosecond decay of the emitted field. This nonlinear response is dominated by the super-radiant decay of optically inverted impurity transitions, (ii) a nonlinear THz-pump-midinfrared-probe experiment shows that ultrafast acceleration of free carriers in n-type GaAs in a strong THz field results in an oscillatory occurrence of midinfrared gain/absorption with the LO phonon frequency. |
| doi_str_mv | 10.1109/ICIMW.2007.4516676 |
| format | Conference Proceeding |
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We report on two experiments on n-type GaAs, which are in strong contrast to the predictions of Drude theory, (i) nonlinear propagation of intense THz pulses through a thin n-type GaAs layer shows a coherent emission at 2 THz with a picosecond decay of the emitted field. This nonlinear response is dominated by the super-radiant decay of optically inverted impurity transitions, (ii) a nonlinear THz-pump-midinfrared-probe experiment shows that ultrafast acceleration of free carriers in n-type GaAs in a strong THz field results in an oscillatory occurrence of midinfrared gain/absorption with the LO phonon frequency.</abstract><pub>IEEE</pub><doi>10.1109/ICIMW.2007.4516676</doi><tpages>3</tpages></addata></record> |
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| identifier | ISSN: 2162-2027 |
| ispartof | 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics, 2007, p.672-674 |
| issn | 2162-2027 |
| language | eng |
| recordid | cdi_ieee_primary_4516676 |
| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Acceleration Gallium arsenide Impurities Nonlinear optics Optical propagation Optical pulse generation Optical pulses Spectroscopy Stimulated emission Ultrafast optics |
| title | Nonlinear THz optics-ultrafast spectroscopy |
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