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(a) Experimental setup and (b) the adiabatically compressed waveguide structure.
(a) Output THz pulses from the compressed waveguide with midpoint separations of 91 (reference), 48, 24, 12, and . The inset is the zoom-in view of the pulses. (b) The respective spectra.
Comparison of the measured (dots) and calculated (solid line) plate separations for the compressed waveguide with midpoint plate separation.
Spectral ratios between the transmitted THz pulses from compressed waveguide and that from the reference guide. Experiment (dots); theory (solid lines).
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