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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 6 — May. 26, 2009

Tunable and polarization-selective THz range transmission properties of metallic rectangular array with a varying hole channel shape

Wei Wang, Yalin Lu, R. J. Knize, Kitt Reinhardt, and Shaochen Chen  »View Author Affiliations


Optics Express, Vol. 17, Issue 9, pp. 7361-7367 (2009)
http://dx.doi.org/10.1364/OE.17.007361


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Abstract

This paper proposes a metallic hole array of a rectangular converging-diverging channel (RCDC) shape with extraordinary transmission. We use a three-dimensional (3D) finite element method to analyze the transmission characteristics of two-dimensional metallic hole arrays (2D-MHA) with RCDC. For a straight channel MHA, when the aperture size is reduced, the transmission peaks have a blue-shift. The same result is observed for a smaller gap throat for the RCDC structure. For the rectangular holes with a high length-width ratio, a similar blue-shift in the transmission peaks as well as a narrower full width at half maximum (FWHM) are observed. The asymmetry from the rectangular shape gives this structure high selectivity for light with different polarizations. Furthermore, the RCDC shape gives extra degrees of geometrical variables to 2D-MHA for tuning the location of the transmission peak and the FWHM. The tunable transmission property of this structure shows promise for applications in tunable filters, photonic circuits, and biosensors.

© 2009 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1220) Diffraction and gratings : Apertures
(120.2440) Instrumentation, measurement, and metrology : Filters
(120.7000) Instrumentation, measurement, and metrology : Transmission
(240.6680) Optics at surfaces : Surface plasmons
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 23, 2009
Revised Manuscript: March 31, 2009
Manuscript Accepted: April 2, 2009
Published: April 20, 2009

Virtual Issues
Vol. 4, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Wei Wang, Yalin Lu, R. J. Knize, Kitt Reinhardt, and Shaochen Chen, "Tunable and polarization-selective THz range transmission properties of metallic rectangular array with a varying hole channel shape," Opt. Express 17, 7361-7367 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-9-7361


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