Invited Article: Narrowband terahertz bandpass filters employing stacked bilayer metasurface antireflection structures

Chun Chieh Chang, Li Huang, John Nogan, Hou Tong Chen

研究成果: 雜誌貢獻期刊論文同行評審

29 引文 斯高帕斯(Scopus)

摘要

We experimentally demonstrate high-performance narrowband terahertz (THz) bandpass filters through cascading multiple bilayer metasurface antireflection structures. Each bilayer metasurface, consisting of a square array of silicon pillars with a self-aligned top gold resonator-array and a complementary bottom gold slot-array, enables near-zero reflection and simultaneously close-to-unity single-band transmission at designed operational frequencies in the THz spectral region. The THz bandpass filters based on stacked bilayer metasurfaces allow a fairly narrow, high-transmission passband, and a fast roll-off to an extremely clean background outside the passband, thereby providing superior bandpass performance. The demonstrated scheme of narrowband THz bandpass filtering is of great importance for a variety of applications where spectrally clean, high THz transmission over a narrow bandwidth is desired, such as THz spectroscopy and imaging, molecular detection and monitoring, security screening, and THz wireless communications.

原文英語
文章編號051602
期刊APL Photonics
3
發行號5
DOIs
出版狀態已發佈 - 2018 五月 1
對外發佈

ASJC Scopus subject areas

  • 原子與分子物理與光學
  • 電腦網路與通信

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