Invited Article: Narrowband terahertz bandpass filters employing stacked bilayer metasurface antireflection structures
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Harbin Inst. of Technology (China)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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.
- Research Organization:
- Los Alamos National Laboratory (LANL)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1423978
- Alternate ID(s):
- OSTI ID: 1419699
- Report Number(s):
- LA-UR-17-28324
- Journal Information:
- APL Photonics, Journal Name: APL Photonics Journal Issue: 5 Vol. 3; ISSN 2378-0967
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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