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Proceedings Paper

Subwavelength hole array enhanced light transmission
Author(s): Stefan Enoch; Evgueni K. Popov; Michel Neviere; Raymond Reinisch
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Paper Abstract

An electromagnetic analysis of a two-dimensional metallic grating is used to explain the extraordinary optical transmission of a metallic film pierced by a two-dimensional subwavelength hole array, observed three years ago. The analysis is based on the Fourier-modal method extended to crossed gratings, which reduces the diffraction problem to the search of eigenvalues and eigenvectors of a particular matrix. The computation of the eigenvalues allows finding a new channel for light transmission through the subwavelength holes, which differs from the transmission channel in the one dimensional case (lamellar or rectangular-rod grating). It is demonstrated that the enhanced transmission is due to the excitation of a surface plasmon on the lower metallic surface.

Paper Details

Date Published: 26 December 2001
PDF: 8 pages
Proc. SPIE 4438, Physics, Theory, and Applications of Periodic Structures in Optics, (26 December 2001); doi: 10.1117/12.451480
Show Author Affiliations
Stefan Enoch, Institut Fresnel (France)
Evgueni K. Popov, Institut Fresnel (France)
Michel Neviere, Institut Fresnel (France)
Raymond Reinisch, Lab d'Electromagnetisme (France)


Published in SPIE Proceedings Vol. 4438:
Physics, Theory, and Applications of Periodic Structures in Optics
Philippe Lalanne, Editor(s)

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