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Proceedings Paper

Array of subwavelength rectangular structures in palladium for optical hydrogen detection
Author(s): Etsuo Maeda; Takanori Matsuki; Ichiro Yamada; Jean-Jacques Delaunay
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Paper Abstract

A computational study of the far field transmittance of subwavelength palladium (Pd) structures is presented with a view of improving optical detection of hydrogen (H2) with subwavelength structures. In previous reports, the optical responses of the far field transmittance spectra with subwavelength hole arrays were used to detect Pd hydride which are formed upon hydrogen exposure. Upon hydride formation, the wavelength of the main transmittance peak of the subwavelength Pd hole arrays showed a shift to longer wavelengths. In this report, the simulated optical response of transmittance spectra upon H2 exposure with the subwavelength Pd hole array and rod array were compared. Our computational studies show that the dip wavelength of rod arrays have larger shifts than that of the peak wavelength of hole arrays upon H2 exposure. The reason of the large optical response of the rod arrays lies in the effect of the expansion of the Pd layer upon H2 exposure that results in larger shift to longer wavelengths for the rod arrays. The rod arrays offer potential advantages to increase the optical response to H2 exposure of Pd subwavelength structures.

Paper Details

Date Published: 27 February 2012
PDF: 5 pages
Proc. SPIE 8264, Integrated Optics: Devices, Materials, and Technologies XVI, 82640N (27 February 2012); doi: 10.1117/12.907509
Show Author Affiliations
Etsuo Maeda, The Univ. of Tokyo (Japan)
Takanori Matsuki, The Univ. of Tokyo (Japan)
Ichiro Yamada, The Univ. of Tokyo (Japan)
Jean-Jacques Delaunay, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 8264:
Integrated Optics: Devices, Materials, and Technologies XVI
Jean Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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