Open AccessNear field imaging of terahertz focusing onto rectangular apertures
Author(s) -
Minah Seo,
A. J. L. Adam,
Jihun Kang,
Juwon Lee,
Kwang Jun Ahn,
Q. H. Park,
P. C. M. Planken,
D. S. Kim
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.020484
Subject(s) - optics , terahertz radiation , field (mathematics) , rectangle , near and far field , terahertz spectroscopy and technology , physics , amplitude , resolution (logic) , resonance (particle physics) , diffraction , materials science , atomic physics , geometry , mathematics , artificial intelligence , computer science , pure mathematics
We performed terahertz near-field experiments on single rectangular holes with various lengths grown on an electro-optic crystal substrate with lambda/100 resolution. We find that the near-field amplitude becomes proportionally larger as the rectangle becomes narrower, strongly suggesting that a constant energy passes through even for a very narrow slit. The occurrence of a large field enhancement at the fundamental localized resonance is discussed confirming the funneling of energy at the near-field.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom