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Design and experimental verification of terahertz wideband filter based on double-layered metal hole arrays |
Applied Optics, Vol. 51, Issue 7, pp. 912-916 (2012)
http://dx.doi.org/10.1364/AO.51.000912
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Abstract
A terahertz wideband filter based on double layer metal hole arrays is designed in this paper. A metal hole array is perforated on a metal layer with a square array of circular air holes. The transmission characteristics of the electromagnetic waves through the metal hole array can be determined by the accumulation of in-phase scattering, spoof surface plasmon polaritons, and waveguide modes. The transmission spectrum is tuned by adding another identical layer metal hole array, and a wideband filter can be formed accordingly. Samples containing double-layered metal hole arrays were fabricated by micromachining technology. A wideband filter with center frequency located at 0.8 THz and FWHM reaching 400 GHz was experimentally achieved.
© 2012 Optical Society of America
OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(120.2440) Instrumentation, measurement, and metrology : Filters
(240.6680) Optics at surfaces : Surface plasmons
(260.3090) Physical optics : Infrared, far
ToC Category:
Optics at Surfaces
History
Original Manuscript: August 12, 2011
Revised Manuscript: November 16, 2011
Manuscript Accepted: November 20, 2011
Published: February 28, 2012
Citation
Lei Rao, Dongxiao Yang, Le Zhang, Tao Li, and Song Xia, "Design and experimental verification of terahertz wideband filter based on double-layered metal hole arrays," Appl. Opt. 51, 912-916 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-7-912
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