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A new fabrication process for passive terahertz components is introduced. Molds are 3D printed on a commercially available 3D printer using rigid opaque material Vero White. An injection molding machine is used to melt low density polyethylene (LDPE) and high density polyethelene (HDPE) pellets to fill the molds. Sample components are designed in ANSYS HFSS and fabricated using the new process including...
Photonic Bandgap structures are proposed for the design of the coupler of a 346 GHz sheet-beam backward wave oscillator. The design solves for typical issues of THz vacuum electron devices based on large sheet beams.
Terahertz wave transmission characteristic, a periodic array sub-wavelength holes slab, has been characterized by terahertz time-domain spectroscopy in the region from 0.1 to 3THz. The measurement results show that the transmittance peak of the periodic array sub-wavelength holes slab is about 35% at frequency of 2.11THz, which is consistent with that of calculation. The periodic array sub-wavelength...
We have been exploring several slow-wave circuits for terahertz frequency backward-oscillators that are suitable for microfabrication. The circuits include folded waveguide circuits based on either rectangular or photonic crystal waveguides, as well as interdigital lines microfabricated either on substrates, suspended micron-scale membranes, or with entirely free-standing interdigital fingers. Beginning...
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