Title :
Capacitance free generation and detection of subpicosecond electrical pulses on coplanar transmission lines
Author :
Grischkowsky, Daniel R. ; Ketchen, Mark B. ; Chi, C.C. ; Duling, Irl N., III ; Halas, Naomi J. ; Halbout, Jean-Marc ; May, Paul G.
Author_Institution :
T.J. Watson Res. Center, IBM Res. Div., Yorktown Heights, NY, USA
Abstract :
By reanalyzing an earlier experiment to generate subpicosecond pulses using photoconductive switches (M.B. Ketchen, et al., Appl. Phys. Lett., vol.48, pp.751-753, 1986), it is shown that to first order, the sliding-contact generation site has no capacitance. This conclusion is further supported by a double sliding-contact experiment where, to first order, neither the generation nor the detection site has any capacitance. This result removes the parasitic capacitance of the electrical circuit as one of the major difficulties to short electrical pulse generation using photoconductive switches.<>
Keywords :
photoconducting devices; pulse generators; transmission lines; capacitance free generation; coplanar transmission lines; detection; double sliding-contact experiment; electrical circuit; first order; parasitic capacitance; photoconductive switches; short electrical pulse generation; sliding-contact generation site; subpicosecond electrical pulses; Capacitance; Charge carrier lifetime; Electric variables measurement; Optical pulse generation; Optical pulses; Pulse generation; Pulse measurements; Switches; Transmission line measurements; Transmission line theory;
Journal_Title :
Quantum Electronics, IEEE Journal of
