Terahertz Near-Field Vectorial Imaging of Subwavelength Apertures and Aperture Arrays

被引：41

作者：

Knab, J. R. ^{[1
]}

Adam, A. J. L. ^{[1
]}

Nagel, M. ^{[2
]}

Shaner, E. ^{[3
]}

Seo, M. A. ^{[4
,5
]}

Kim, D. S. ^{[4
,5
]}

Planken, P. C. M. ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Sci Appl, Dept Imaging Sci & Technol, Opt Res Grp, NL-2628 CJ Delft, Netherlands

[2] Rhein Westfal TH Aachen, Inst Halbleitertech, D-52074 Aachen, Germany

[3] Sandia Natl Labs, Albuquerque, NM 87185 USA

[4] Seoul Natl Univ, Ctr Subwavelength Opt, Seoul 151747, South Korea

[5] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 17期

关键词：

EXTRAORDINARY OPTICAL-TRANSMISSION; ENHANCED TRANSMISSION; SURFACE-PLASMONS; PERIODIC ARRAY; LIGHT; GENERATION; EMISSION; METALS;

D O I：

10.1364/OE.17.015072

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present measurements of the complete terahertz (THz) electric near-field distribution, E-x, E-y and E-z, 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. (C) 2009 Optical Society of America

引用

页码：15072 / 15086

页数：15

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