Strong influence of hole shape on extraordinary transmission through periodic arrays

K.J. Klein Koerkamp, S. Enoch, Franciscus B. Segerink, N.F. van Hulst, L. Kuipers

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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 (~2500 cm-1). A comparison with the transmission of isolated holes shows that shape resonances of the rectangular holes play a dominant role.
Original languageUndefined
Pages (from-to)183901-1-183901-4
Number of pages4
JournalPhysical review letters
Issue number18
Publication statusPublished - 2004


  • IR-47573
  • METIS-218154

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