Terahertz generation by AlGaAs nanowires

The results of investigation of terahertz generation in Al
_0.2
Ga
_0.8
As nanowires by the optical excitation of femtosecond pulses are presented. It is shown that the radiation is generated by excitation of photocarriers in nanowires. The time-resolved dynamics of photocarriers were studied by optical-pump terahertz generation-probe time-domain spectroscopy.