Plasmonic subwavelength waveguides: next to zero losses at sharp bends
We demonstrate that approximately 100% transmission of a strongly localized channel plasmon-polariton can be achieved through a sharp 90 degree bend in a sub-wavelength waveguide in the form of a triangular groove on a metal surface – the feature that has previously been demonstrated only for photonic crystal waveguides which do not provide sub-wavelength localization. Conditions for minimum reflection and radiative losses at the bend are investigated numerically using the finite-difference time-domain algorithm. Dissipation in the structure is demonstrated to be sufficiently low to ensure significant propagation distances (a number of wavelengths) of the localized plasmon in each of the arms of the bend.
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|Item Type:||Journal Article|
|Subjects:||Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2005 Optical Society of America|
|Copyright Statement:||This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://ol.osa.org/abstract.cfm?id=83786. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.|
|Deposited On:||23 May 2005|
|Last Modified:||29 Feb 2012 13:16|
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