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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 11 — Nov. 1, 2013
  • pp: 2898–2905

Bandgap-confined large-mode waveguides for surface plasmon-polaritons

Carsten Reinhardt, Andrey B. Evlyukhin, Wei Cheng, Tobias Birr, Andrey Markov, Bora Ung, Maksim Skorobogatiy, and Boris N. Chichkov  »View Author Affiliations


JOSA B, Vol. 30, Issue 11, pp. 2898-2905 (2013)
http://dx.doi.org/10.1364/JOSAB.30.002898


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Abstract

The optical properties of a novel type of open waveguiding structure for surface plasmon-polaritons (SPPs) are experimentally investigated. The waveguide consists of a strip-like region of a gold surface confined by a periodic sequence of dielectric ridges forming a Bragg-type reflector. This bandgap structure resembles the plasmonic analogue of an antiresonant reflecting optical waveguide (ARROW) for SPPs, providing direct access to the guided plasmonic field. The main structural parameters are evaluated by numerical modeling using the finite element and finite-difference time-domain methods. We investigate field distributions of the plasmonic modes in the antiresonant Bragg-reflector waveguides with varied numbers of dielectric ridges and demonstrate a large mode-area single-mode performance at a telecom wavelength of 1550 nm. Furthermore, for an excitation wavelength of 974 nm, it is shown that different low-order modes can be selectively excited using multiple laser beams with variable phase relation. Selective excitation of single longitudinal and transversal modes of the waveguide is realized by coherent two-beam excitation. Possible sensing applications of these large-mode open waveguides are discussed.

© 2013 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Optics at Surfaces

History
Original Manuscript: July 9, 2013
Revised Manuscript: September 10, 2013
Manuscript Accepted: September 13, 2013
Published: October 15, 2013

Citation
Carsten Reinhardt, Andrey B. Evlyukhin, Wei Cheng, Tobias Birr, Andrey Markov, Bora Ung, Maksim Skorobogatiy, and Boris N. Chichkov, "Bandgap-confined large-mode waveguides for surface plasmon-polaritons," J. Opt. Soc. Am. B 30, 2898-2905 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-11-2898

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