Now showing items 1-6 of 6

    • A terahertz band-pass resonator based on enhanced reflectivity using spoof surface plasmons 

      Liu, Jingbo; Mendis, Rajind; Mittleman, Daniel M. (2013)
      We demonstrate a band-pass resonator in the terahertz (THz) range, based on a frequency-selective designer reflector. The resonator consists of a parallel-plate waveguide, a designed groove pattern cut into the output facet ...
    • Focused terahertz waves generated by a phase velocity gradient in a parallel-plate waveguide 

      McKinney, Robert W.; Monnai, Yasuaki; Mendis, Rajind; Mittleman, Daniel (2015)
      We demonstrate the focusing of a free-space THz beam emerging from a leaky parallel-plate waveguide (PPWG). Focusing is accomplished by grading the launch angle of the leaky wave using a PPWG with gradient plate separation. ...
    • A Maxwell’s fish eye lens for the terahertz region 

      Liu, Jingbo; Mendis, Rajind; Mittleman, Daniel M. (2013-07-15)
      We implement a two-dimensional Maxwell’s fish eye lens using a waveguide-based artificial dielectric. The Maxwell’s fish eye lens consists of two metallic cylindrical plates sandwiching a free-space region, with the inner ...
    • A mode-matching analysis of dielectric-filled resonant cavities coupled to terahertz parallelplate waveguides 

      Astley, Victoria; Reichel, Kimberly S.; Jones, Jonathan; Mendis, Rajind; Mittleman, Daniel M. (2012-09-07)
      We use the mode-matching technique to study parallel-plate waveguide resonant cavities that are filled with a dielectric. We apply the generalized scattering matrix theory to calculate the power transmission through the ...
    • Terahertz Artificial Dielectric Lens 

      Mendis, Rajind; Nagai, Masaya; Wang, Yiqiu; Karl, Nicholas; Mittleman, Daniel M. (2016)
      We have designed, fabricated, and experimentally characterized a lens for the THz regime based on artificial dielectrics. These are man-made media that mimic properties of naturally occurring dielectric media, or even ...
    • Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor 

      Astley, Victoria; Reichel, Kimberly; Mendis, Rajind; Mittleman, Daniel M. (2012)
      Refractive index (RI) sensing is a powerful noninvasive and label-free sensing technique for the identification, detection and monitoring of microfluidic samples with a wide range of possible sensor designs such as ...