We have generated sub-single-cycle pulses of electromagnetic radiation with pulse energies as high as 0.8 μJ and pulse lengths < 500 fs. The 10-dB width of the spectrum is 1.5 THz. The transmitter is a GaAs wafer illuminated at normal incidence by 120-fs, 770-nm pulses from a Ti:sapphire chirped-pulse amplifier system while a pulsed electric field is applied across the surface. The pulse energy of the far-infrared radiation is found to be a quadratic function of bias field and a nonmonotonic function of laser intensity.
© 1993 Optical Society of America
Original Manuscript: September 21, 1992
Published: February 15, 1993
D. You, D. R. Dykaar, R. R. Jones, and P. H. Bucksbaum, "Generation of high-power sub-single-cycle 500-fs electromagnetic pulses," Opt. Lett. 18, 290-292 (1993)