Print Email Facebook Twitter Terahertz Near-Field Vectorial Imaging of Subwavelength Apertures and Aperture Arrays Title Terahertz Near-Field Vectorial Imaging of Subwavelength Apertures and Aperture Arrays Author Knab, J.R. Adam, A.J.L. Nagel, M. Shaner, E. Seo, M.A. Kim, D.S. Planken, P.C.M. Faculty Applied Sciences Department Imaging Science and Technology Date 2009-08-11 Abstract We present measurements of the complete terahertz (THz) electric near-field distribution, Ex, Ey and Ez, in both the time- and frequency-domains, for subwavelength apertures and subsections of subwavelength aperture arrays. Measuring the individual components of the THz near-field with subwavelength spatial resolution, as they emerge from these structures, illustrates how the field interacts with the apertures. We observe the small but measurable y- and z-components of the electric field for both single apertures and arrays. Resonant contributions, attributed to Bloch modes, are detected and we observe the presence of a longitudinal field component, Ez, within the different array apertures, which can be attributed to a diffractive effect. These measurements illustrate in detail the individual THz field components emerging from subwavelength apertures and provide a direct measure of two important mechanisms that contribute to the net transmission of light through arrays. Subject aperturessubwavelength structuresterahertz imaging To reference this document use: http://resolver.tudelft.nl/uuid:18761d15-4d66-4e6f-9176-67e5a26d6e78 DOI https://doi.org/10.1364/OE.17.015072 Publisher Optical Society of America ISSN 1094-4087 Source http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-17-15072 Source Optics Express, 17 (17), 2009 Part of collection Institutional Repository Document type journal article Rights (c) 2009 Optical Society of America Files PDF Knab_2009.pdf 1.51 MB Close viewer /islandora/object/uuid:18761d15-4d66-4e6f-9176-67e5a26d6e78/datastream/OBJ/view