Terahertz Near-Field Imaging Using Enhanced Transmission through a Single Subwavelength Aperture
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概要
- 論文の詳細を見る
We demonstrate terahertz (THz) near-field imaging using resonantly enhanced transmission of THz-wave radiation ($\lambda\sim 200$ μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The bull's eye structure shows extremely large enhanced transmission, which has the advantage for a single subwavelength aperture. The spatial resolution for the bull's eye structure (with an aperture diameter $d=100$ μm) is evaluated in the near-field region, and a resolution of 50 μm (corresponding to $\lambda/4$) is achieved. We obtain the THz near-field images of the subwavelength metal pattern with a spatial resolution below the diffraction limit.
- Japan Society of Applied Physicsの論文
- 2005-07-10
著者
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Shikata Jun-ichi
Research Institute Of Electrical Communication Tohoku University
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Minamide Hiroaki
Photodynamics Research Center Riken
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Ohashi Keishi
Fundamental And Environmental Research Laboratories Nec Corporation
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Ikari Tomofumi
Photodynamics Research Center Riken
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Ishihara Kunihiko
Fundamental And Environmental Research Laboratories Nec Corporation
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Ito Hiromasa
Photo Dynamics Research Center Riken
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Yokoyama Hiroyuki
New Industry Creation Hatchery Center (niche) Tohoku University
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Yokoyama Hiroyuki
New Industry Creation Hatchery Center, Tohoku University, 10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Ikari Tomofumi
Photodynamics Research Center, RIKEN, 519-1399 Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
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Shikata Jun-ichi
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Minamide Hiroaki
Photodynamics Research Center, RIKEN, 519-1399 Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
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Ito Hiromasa
Photodynamics Research Center, RIKEN, 519-1399 Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
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