Experimental comparison between conventional and hybrid long-range surface plasmon waveguide bends

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Experimental comparison between conventional and hybrid long-range surface plasmon waveguide bends

Aloyse Degiron, Sang-Yeon Cho, Cameron Harrison, Nan Marie Jokerst, Claudio Dellagiacoma, Olivier J. F. Martin, and David R. Smith

Phys. Rev. A 77, 021804(R) – Published 25 February 2008

Abstract

We report on the characterization of long-range surface plasmon waveguide bends at telecom wavelengths $(λ = 1550 nm)$ . The structures consist of a thin Au stripe embedded in a transparent polymer film. When the polymer thickness is larger than the lateral extension of the plasmon, the stripe sustains a conventional long-range mode; in the opposite case, the mode is hybrid because its field distribution is confined by total internal reflection in the dielectric cladding. This hybridization increases the damping by absorption but dramatically reduces the radiation loss that occurs for curved geometries, such as bends. Our results are supported quantitatively by full-wave finite-element simulations.

Received 21 November 2007

DOI:https://doi.org/10.1103/PhysRevA.77.021804

Authors & Affiliations

Aloyse Degiron¹, Sang-Yeon Cho^1,*, Cameron Harrison¹, Nan Marie Jokerst¹, Claudio Dellagiacoma^2,†, Olivier J. F. Martin², and David R. Smith^1,‡

¹Center for Metamaterials and Integrated Plasmonics, Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, North Carolina 27708, USA
²Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne, EPFL-STI-NAM, ELG Station 11, CH-1015 Lausanne, Switzerland

^*Present address: Klipsch School of Electrical and Computer Engineering, New Mexico State University, P.O. Box 30001, MSC 3-O, Las Cruces, NM 88003-8001, USA.
^†Present address: Laboratoire d’Optique Biomédicale, Swiss Federal Institute of Technology, EPFL-STI-SMT-LOB, BM 5.140, Station 17, CH-1015 Lausanne, Switzerland.
^‡drsmith@ee.duke.edu

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Issue

Vol. 77, Iss. 2 — February 2008

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