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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 24 — Dec. 15, 2006
  • pp: 3606–3608

Low-loss subwavelength metal C-aperture waveguide

Liying Sun and Lambertus Hesselink  »View Author Affiliations

Optics Letters, Vol. 31, Issue 24, pp. 3606-3608 (2006)

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We present a design of a linear optical waveguide that utilizes a C-shaped metallic nano-aperture that efficiently transports light while maintaining a spot size of λ 10 . The performance of a C-aperture waveguide is superior to both a regular ridge waveguide and other surface plasmon based metal nano-optical waveguides. The energy transport mechanisms are explained by the coupling of an aperture surface resonance and the thickness resonances inside the guide channel. Finite-difference time-domain simulations of gold C-aperture waveguides are performed for a 1.5 μ m wavelength incident plane wave. The 1 e decay length in power transmission is predicted to be 2.5 μ m . The total power throughput is 1.66 for the 2.55 μ m long guide, with an intensity 6 times that of the incident wave at a distance 120 nm from the exit plane, having a spot size of 150 nm .

© 2006 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(130.0250) Integrated optics : Optoelectronics
(130.2790) Integrated optics : Guided waves

ToC Category:
Integrated Optics

Original Manuscript: March 13, 2006
Revised Manuscript: July 10, 2006
Manuscript Accepted: July 19, 2006
Published: November 22, 2006

Liying Sun and Lambertus Hesselink, "Low-loss subwavelength metal C-aperture waveguide," Opt. Lett. 31, 3606-3608 (2006)

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