The magnetic field dependence of terahertz radiation from InAs excited by femtosecond laser pulses has been measured with the time-domain spectroscopy up to 10 T. The magnetic field dependence of n-InAs shows a radiation power minimum around 5 T whereas p-InAs does not show such a minimum. Additionally, it is found that the polarity of the amplitude of terahertz radiation is reversed at 5 T for n-InAs. This polarity reversal is attributed to a crossover of the radiation mechanism from the photo-Dember effect to magnetoplasma oscillations with increasing magnetic field.
Investigation of the Mechanism of Terahertz Radiation from InAs under Magnetic Fields
01.09.2006
1221438 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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