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Proceedings Paper

Surface-plasmon coupling in subwavelength periodic structures
Author(s): K. Y. Choi; Jaewong Yoon; Seok Ho Song; Cha Hwan Oh; Phil Soo Kim
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Paper Abstract

Strong reemission of the surface plasmons through a single subwavelength aperture is mainly caused by in-phase coupling of the surface localized electromagnetic waves to irradiative modes by periodic groove structures. By introducing a linear chirping in the groove period, we enhance the coupling effect for focusing the reemitted light in near-field region. The linear chirping in the groove structures which have monotonically decreasing period, leads to focusing the reemitted light with the length, depth, and width of the focus in order of wavelength. We show numerically that the focusing ability is dramatically affected by amount of the linear chirping, and that efficient relaying of a diverging Gaussian beam to a photonic crystal waveguide can be achieved.

Paper Details

Date Published: 7 February 2005
PDF: 5 pages
Proc. SPIE 5636, Holography, Diffractive Optics, and Applications II, (7 February 2005); doi: 10.1117/12.576207
Show Author Affiliations
K. Y. Choi, Hanyang Univ. (South Korea)
Jaewong Yoon, Hanyang Univ. (South Korea)
Seok Ho Song, Hanyang Univ. (South Korea)
Cha Hwan Oh, Hanyang Univ. (South Korea)
Phil Soo Kim, Hanyang Univ. (South Korea)

Published in SPIE Proceedings Vol. 5636:
Holography, Diffractive Optics, and Applications II
Yunlong Sheng; Dahsiung Hsu; Chongxiu Yu; Byoungho Lee, Editor(s)

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