Advanced terahertz electric near-field measurements at sub-wavelength diameter metallic apertures

被引：84

作者：

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

Brok, J. M. ^{[1
]}

Seo, M. A. ^{[2
]}

Ahn, K. J. ^{[2
]}

Kim, D. S. ^{[2
]}

Kang, J. H. ^{[3
]}

Park, Q. H. ^{[3
]}

Nagel, M. ^{[4
]}

Planken, P. C. M. ^{[1
,5
]}

机构：

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

[2] Seoul Natl Univ, Sch Phys & Astron, Seoul 151747, South Korea

[3] Korea Univ, Dept Phys, Seoul 136701, South Korea

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

[5] Inst Plasma Phys Rijnhuizen, FOM, NL-3439 MN Nieuwegein, Netherlands

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 10期

关键词：

D O I：

10.1364/OE.16.007407

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using terahertz-light excitation, we have measured with sub-wavelength spatial, and sub-cycle temporal resolution the time- and frequency-dependent electric-field and surface-charge density in the vicinity of small metallic holes. In addition to a singularity like concentration of the electric field near the hole edges, we observe, that holes can act as differential operators whose near-field output is the time-derivative of the incident electric field. Our results confirm the well-known predictions made by Bouwkamp, Philips Res. Rep. 5, 321-332 (1950), and reveal, with unprecedented detail, what physically happens when light passes through a small hole. (C) 2008 Optical Society of America.

引用

页码：7407 / 7417

页数：11

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