Rw. Mcgowan et D. Grischkowsky, Experimental time-domain study of THz signals from impulse excitation of ahorizontal surface dipole, APPL PHYS L, 74(12), 1999, pp. 1764-1766
Using optoelectronic techniques with sub-ps resolution, we have characteriz
ed the electric-field time-domain response from an impulsively excited, mic
ron-sized dipole antenna on a dielectric surface. When detected by an adjac
ent dipole antenna 400 mu m distant, two primary signals are observed, a fa
r-field pulse reflected from the back surface of the substrate and a surfac
e-wave pulse. The surface-wave pulse appears as two distinct surface-propag
ating pulses despite originating from the dipole simultaneously. (C) 1999 A
merican Institute of Physics. [S0003-6951(99)02712-6].