Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3013585
Keywords
circular waveguides; dielectric thin films; dielectric-loaded waveguides; losses; metallic thin films; polymer films; silver; submillimetre wave devices
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Funding
- Bell Laboratories, Murray Hill, NJ
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Cylindrical hollow-core metallic waveguides with an inner coating of polystyrene (PS) deposited over silver have losses less than 1dB/m for terahertz waves propagating in the HE11 mode. The thickness of the PS film determines whether the hybrid HE11 mode or the transverse TE01 mode exhibits the lowest loss. The mode selection is confirmed by studying mode profiles and transmission losses at 2.5 THz in waveguides with the dielectric coating thickness ranging from 0 to the optimum value of approximately 10 mu m.
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