Title :
Guided surface waves in photoconductive excitation
Author :
Shah, S.A. ; Zeng, A. ; Jackson, M.K. ; Pouliot, L. ; Lecours, A. ; Currie, J.F.
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
fDate :
9/1/1996 12:00:00 AM
Abstract :
We have used electrooptic sampling to measure photoconductively generated signals on coplanar striplines. We observe a new feature in the measured signal that we attribute to photoconductively-excited surface waves. Measurements at positions laterally displaced from the center of the transmission line show that when the substrate is thin, this signal is confined to the region of the electrodes. We also show that this feature, which can interfere with accurate device characterization, can be eliminated by delaying it out of the time window of interest,
Keywords :
photoconducting switches; photoconductivity; strip lines; surface electromagnetic waves; accurate device characterization; coplanar striplines; electrooptic sampling; guided surface waves; photoconductive excitation; photoconductively generated signals; photoconductively-excited surface waves; transmission line; Coplanar transmission lines; Displacement measurement; Electrodes; Photoconductivity; Position measurement; Sampling methods; Signal generators; Stripline; Surface waves; Transmission line measurements;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
