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Proceedings Paper

Low-loss intersection of subwavelength plasmonic slot waveguides
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Paper Abstract

The properties of crossing for two perpendicular subwavelength plasmonic slot waveguides are theoretically investigated. Results show when encountering a nano intersection the crosstalk for the direct crossing is around 25%, almost the same as throughput. In terms of symmetry considerations and resonant-tunnelling effect, we design two types of compact cavity-based structures. Our results show that the crosstalk is eliminated and the throughput reaches the unity on resonance. Simulation results are in agreement with those from coupled-mode theory. Taking material loss into account, the symmetry properties of the modes are preserved and the crosstalk remains suppressed. Our results may open a way to construct nanoscale crossings for high-density nanoplasmonic integration circuits.

Paper Details

Date Published: 18 November 2008
PDF: 9 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 71352J (18 November 2008); doi: 10.1117/12.803459
Show Author Affiliations
Sanshui Xiao, Technical Univ. of Denmark (Denmark)
Niels Asger Mortensen, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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