Strong influence of hole shape on extraordinary transmission through periodic arrays

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Klein Koerkamp, K.J. and Enoch, S. and Segerink, F.B. and Hulst, N.F. van and Kuipers, L. (2004) Strong influence of hole shape on extraordinary transmission through periodic arrays. Physical Review Letters, 92 (18). p. 183901. ISSN 0031-9007

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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 (~2500 cm-1). A comparison with the transmission of isolated holes shows that shape resonances of the rectangular holes play a dominant role.
Item Type:Article
Copyright:© 2004 American Physical Society
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Link to this item:http://purl.utwente.nl/publications/47573
Official URL:http://dx.doi.org/10.1103/PhysRevLett.92.183901
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Metis ID: 218154