Fourier-transform terahertz near-field imaging of one-dimensional slit arrays: Mapping of electric-field-, magnetic-field-, and Poynting vectors

M. A. Seo, A. J.L. Adam, J. H. Kang, J. W. Lee, S. C. Jeoung, Q. H. Park, P. C.M. Planken, D. S. Kim

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

We present 2D measurements of the full THz electric field behind a sample consisting of multiple slits in a metal foil. Our measurements, which have a sub-wavelength spatial, and a sub-period temporal resolution, reveal electric field lines, electric field vortices and saddle points. From our measurements we are able to reconstruct the magnetic field and, finally, the position and time-dependent Poynting vector which shows the flow of energy behind the sample. Our results show that it is possible to study the flow of light near sub-wavelength plasmonic structures such as slit-arrays and, by implication, other metamaterial samples.

Original languageEnglish
Pages (from-to)11781-11789
Number of pages9
JournalOptics Express
Volume15
Issue number19
DOIs
Publication statusPublished - 2007 Sep 17

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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