Strong Influence of Hole Shape on Extraordinary Transmission through Periodic Arrays of Subwavelength Holes

K. J. Klein Koerkamp, S. Enoch, F. B. Segerink, N. F. van Hulst, and L. Kuipers
Phys. Rev. Lett. 92, 183901 – Published 4 May 2004

Abstract

We show that extraordinary light transmission of periodic subwavelength hole arrays, generally attributed to surface-plasmon resonances, is strongly influenced by the hole shape. Both experiments and calculations, based on a Fourier modal method, demonstrate that a shape change from circular to rectangular increases the normalized transmission by an order of magnitude while the hole area decreases. Moreover, the spectra exhibit large redshifts (2500cm1). A comparison with the transmission of isolated holes shows that shape resonances of the rectangular holes play a dominant role.

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  • Received 7 March 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.183901

©2004 American Physical Society

Authors & Affiliations

K. J. Klein Koerkamp1, S. Enoch2, F. B. Segerink1, N. F. van Hulst1, and L. Kuipers1,3

  • 1Applied Optics Group, MESA+ Institute for Nanotechnology and Department of Science & Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
  • 2Institut Fresnel, CNRS 6133, Campus de St. Jérôme, case 161, 13397 Marseille Cedex 20, France
  • 3FOM-Institute for Atomic and Molecular Physics (AMOLF), Kruislaan 407, 1098 SJ Amsterdam, The Netherlands

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Vol. 92, Iss. 18 — 7 May 2004

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