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APS » Journals » Phys. Rev. B » Volume 80 » Issue 11
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Phys. Rev. B 80, 113101 (2009) [4 pages]

Parallel-chain optical transmission line for a low-loss ultraconfined light beam

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Andrea Alù1,2,*, Pavel A. Belov3,4,†, and Nader Engheta1,‡
1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
2Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78712, USA
3Department of Electronic Engineering, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
4St. Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Prospekt 49, 197101 St. Petersburg, Russia

Received 13 May 2009; revised 20 July 2009; published 8 September 2009

Linear arrays of plasmonic nanoparticles have been suggested by various groups as optical waveguides. Here, inspired by the concept of optical nanocircuits, we show that it is possible to improve the performance of such waveguide chains by pairing two of them, forming a two-wire optical transmission line. We show that choosing the operation regime near the light line may greatly reduce the effect of material absorption and disorder, still allowing field confinement in between the paired chains. Application for low-loss optical interconnects and subwavelength imaging devices are envisioned.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.113101
DOI:
10.1103/PhysRevB.80.113101
PACS:
42.82.Et, 52.40.Db, 52.40.Fd, 78.66.Sq

*alu@mail.utexas.edu

†pavel.belov@elec.qmul.ac.uk

‡Corresponding author. engheta@ee.upenn.edu

 
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