Application of Metal-clad Antiresonant Reflecting Hollow Waveguides to Tunable Terahertz Notch Filter
Journal
OSA Optics Express
Journal Volume
19
Journal Issue
1
Pages
162–167
Date Issued
2011-01
Author(s)
Abstract
A novel tunable terahertz notch filter is demonstrated using antiresonant reflecting hollow waveguides with movable metal layers outside dielectric claddings. Based on the Fabry-Pérot resonance of the dielectric cladding, multiple deep notches are observed in a broad THz transmission spectrum. Continuous shift of notch frequencies is for the first time experimentally observed by lateral translation of metal layers from dielectric claddings. The measured maximum frequency-tuning-range approached 60GHz, equaling to 50% of the bandwidth of every passband, and a 20dB rejection notch-depth with a linewidth as narrow as 6GHz at frequency of around 0.2THz was also achieved. Numerical simulations match the measurements and verify the spectral-tuning mechanism.
Type
journal article