Wavelength-dependent transmission through sharp 90° bends in sub-wavelength metallic slot waveguides
SCIE
SCOPUS
- Title
- Wavelength-dependent transmission through sharp 90° bends in sub-wavelength metallic slot waveguides
- Authors
- Mason, DR; Gramotnev, DK; Kim, KS
- Date Issued
- 2010-07-19
- Publisher
- OPTICAL SOC AMER
- Abstract
- In this paper, we present a comprehensive numerical study of the wavelength-dependence of transmission through sharp 90 degrees bends in metallic slot waveguides with sub-wavelength localization and varying geometrical parameters. In particular, it is demonstrated that increasing the plasmon wavelength results in a significant increase (up to nearly 100%) of transmission through the bend, combined with a reduction in the mode asymmetry in the second arm of the bend. The mode asymmetry and its relaxation are explained by interference of the transmitted mode with non-propagating and leaky modes generated at the bend. Comparison with the two-dimensional case of a metal-dielectric-metal waveguide is also conducted, showing significant differences for the slot waveguides based on the presence of different non-propagating and leaky modes. (C) 2010 Optical Society of America
- Keywords
- CHANNEL PLASMON-POLARITONS; SURFACE; MODES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25735
- DOI
- 10.1364/OE.18.016139
- ISSN
- 1094-4087
- Article Type
- Article
- Citation
- OPTICS EXPRESS, vol. 18, no. 15, page. 16319 - 16145, 2010-07-19
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