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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 16 — Aug. 15, 2014
  • pp: 4723–4726

Transmission enhancement through square coaxial aperture arrays in metallic film: when leaky modes filter infrared light for multispectral imaging

Benjamin Vial, Mireille Commandré, Guillaume Demésy, André Nicolet, Frédéric Zolla, Frédéric Bedu, Hervé Dallaporta, Stéphane Tisserand, and Laurent Roux  »View Author Affiliations


Optics Letters, Vol. 39, Issue 16, pp. 4723-4726 (2014)
http://dx.doi.org/10.1364/OL.39.004723


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Abstract

The diffractive behavior of arrays of square coaxial apertures in a gold layer is studied. These structures exhibit a resonant transmission enhancement that is used to design tunable bandpass filters for multispectral imaging in the 7–13 μm wavelength range. A modal analysis is used for this design and the study of their spectral features. Thus we show that the resonance peak is due to the excitation of leaky modes of the open photonic structure. Fourier transform infrared (FTIR) spectrophotometry transmission measurements of samples deposited on Si substrate show good agreement with numerical results and demonstrate angular tolerance of up to 30 degrees of the fabricated filters.

© 2014 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(110.4234) Imaging systems : Multispectral and hyperspectral imaging
(220.4241) Optical design and fabrication : Nanostructure fabrication
(050.5745) Diffraction and gratings : Resonance domain
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 17, 2014
Revised Manuscript: July 4, 2014
Manuscript Accepted: July 4, 2014
Published: August 6, 2014

Citation
Benjamin Vial, Mireille Commandré, Guillaume Demésy, André Nicolet, Frédéric Zolla, Frédéric Bedu, Hervé Dallaporta, Stéphane Tisserand, and Laurent Roux, "Transmission enhancement through square coaxial aperture arrays in metallic film: when leaky modes filter infrared light for multispectral imaging," Opt. Lett. 39, 4723-4726 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-16-4723

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