Generation of coherent tunable THz waves by using birefringent crystal and grating pair

Abstract

Laser pulses with temporally sinusoidal intensity modulation excited a photoconductive antenna to produce coherent tunable THz waves. The laser pulses with sinusoidal intensity modulation were generated by modulating a femtosecond laser pulses with a birefringent crystal and a grating pair. The carrier-envelope phase (CEP) of the THz waves created by this method was unaffected by the instability of the optics.