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Advanced terahertz electric near-field measurements at sub-wavelength diameter metallic apertures
- Authors
- Adam, A. J. L.; Brok, J. M.; Seo, M. A.; Ahn, K. J.; Kim, D. S.; Kang, J. H.; Park, Q. H.; Nagel, M.; Planken, P. C. M.
- Issue Date
- 12-5월-2008
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS, v.16, no.10, pp.7407 - 7417
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICS EXPRESS
- Volume
- 16
- Number
- 10
- Start Page
- 7407
- End Page
- 7417
- ISSN
- 1094-4087
- Abstract
- 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.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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