摘要
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.
原文 | English |
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頁(從 - 到) | 162-167 |
頁數 | 6 |
期刊 | Optics Express |
卷 | 19 |
發行號 | 1 |
DOIs | |
出版狀態 | Published - 2011 1月 3 |
All Science Journal Classification (ASJC) codes
- 原子與分子物理與光學