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

TitleAdvanced terahertz electric near-field measurements at sub-wavelength diameter metallic apertures
Publication TypeJournal Article
Year of Publication2008
AuthorsA.JL Adam, J.M Brok, M.A Seo, K.J Ahn, D.S Kim, J.H Kang, Q.H Park, M. Nagel, P.CM Planken
JournalOptics Express
Volume16
Number10
Pagination7407-7417
Date PublishedMay
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberISI:000256469800066
KeywordsDIFFRACTION, ENHANCED RAMAN-SCATTERING, HOLE ARRAYS, LIGHT, METAL, MICROSCOPY, OPTICAL-TRANSMISSION, PROBES, REAL
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.

URL<Go to ISI>://000256469800066
Division

GUTHz

PID

140db10e034cf1d0f9b4bc438c904464

Alternate TitleOpt. Express

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