Browsing by Author "Harsha, S. Sree"
Now showing items 1-4 of 4
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Flare coupled metal parallel-plate waveguides for high resolution terahertz time-domain spectroscopy
Theuer, Michael; Harsha, S. Sree; Grischkowsky, D. (AIP Publishing, 2010-12-03)We report on a new coupling scheme for high resolution terahertz spectroscopy of microcrystalline films using parallel-plate waveguides. Metal flares are used to couple the terahertz radiation into and out of the waveguide. ... -
High-Q terahertz Bragg resonances within a metal parallel plate waveguide
Harsha, S. Sree; Laman, N.; Grischkowsky, D. (AIP Publishing, 2009-03-06)One-dimensional (1D) Bragg waveguides are demonstrated at terahertz (THz) frequencies. Lithographically made 1D symmetric and asymmetric dielectric gratings on metallized high conductivity Si chips are incorporated within ... -
Line narrowing of terahertz vibrational modes for organic thin polycrystalline films within a parallel plate waveguide
Melinger, Joseph S.; Laman, N.; Harsha, S. Sree; Grischkowsky, D. (AIP Publishing, 2006-12-19)Waveguide terahertz time-domain spectroscopy is used to demonstrate the narrowing of vibrational lines for a thin polycrystalline film of 1,2-dicyanobenzene in a parallel plate metal waveguide. When compared to corresponding ... -
Terahertz two-cylinder waveguide coupler for transverse-magnetic and transverse-electric mode operation
Theuer, M.; Shutler, A. J.; Harsha, S. Sree; Beigang, R.; Grischkowsky, D. (AIP Publishing, 2011-02-18)We report the coupling and guiding of broadband terahertz radiation using a two-cylinder waveguide coupler. For the transverse electromagnetic TEM (TM0) geometry, the two opposing metal cylinders exhibit an amplitude ...