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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 6
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Phys. Rev. Lett. 95, 063901 (2005) [4 pages]

Surface-Plasmon-Assisted Guiding of Broadband Slow and Subwavelength Light in Air

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Aristeidis Karalis*, E. Lidorikis, Mihai Ibanescu, J. D. Joannopoulos, and Marin Soljačić
Center for Materials Science and Engineering and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Received 23 April 2005; published 2 August 2005

A class of axially uniform waveguides is introduced, employing a new mechanism to guide light inside a low-index dielectric material without the use of photonic band gap, and simultaneously exhibiting subwavelength modal size and very slow group velocity over an unusually large frequency bandwidth. Their basis is the presence of plasmonic modes on the interfaces between dielectric regions and the flat unpatterned surface of a bulk metallic substrate. These novel waveguides allow for easy broadband coupling and exhibit absorption losses limited only by the intrinsic loss of the metal.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.063901
DOI:
10.1103/PhysRevLett.95.063901
PACS:
42.82.Et, 73.20.Mf, 78.20.Ci, 78.68.+m

*Electronic address: aristos@mit.edu

 
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