Full text loading...
(a) Schematic illustration of the photoconductive antenna. (b) Time domain traces of the observed terahertz signals. The traces were shifted vertically and horizontally for clarity. (c) Amplitude spectra of the time domain traces.
Peak-to-peak amplitude in the time domain traces as functions of the spot size of the probe pulses. The numerical values are the gap length of the antenna.
Incident power dependence of the (a) peak-to-peak amplitude in the time domain traces and (b) the conductance of the antenna. The lines represent the dependence of for the probe power .
Averaged values of the noise spectra observed without terahertz waves as a function of the incident power on the detector antenna. The dashed line indicates the value of the amplifier noise obtained without the antenna.
Article metrics loading...