Measuring the wavelength-dependent divergence of transmission through sub-wavelength hole-arrays by spectral imaging

M. W. Docter, I. T. Young, O. M. Piciu, A. Bossche, P. F.A. Alkemade, P. M. Van Den Berg, Y. Garini

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We present a study on the far-field patterns of light transmitted through sub-wavelength metallic hole-arrays. Spectral imaging measurements are used here on hole arrays for the first time. It provides both spatial and spectral information of the transmission in far-field. The visibility of the images, measured in two illumination modes: Köhler and collimated, is calculated for different planes in and out of focus. The transmission under collimated illumination reveals that 75% of the beam if non-divergent. The results are in agreement with the low divergence measured by Lezec [Science 297, 820 (2002)].

Original languageEnglish
Pages (from-to)9477-9482
Number of pages6
JournalOptics Express
Volume14
Issue number20
DOIs
StatePublished - Oct 2006

Bibliographical note

Funding Information:
Financial support of the National Cancer Institute of Canada, the Medical Research Council of Canada, and the Ontario Cancer Treatment and Research Foundation is appreciated

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