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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 27, Iss. 12 — Dec. 1, 2010
  • pp: 2766–2773

Reflectionless tunneling of infrared radiation through subwavelength slit in a waveguide

Alexander Shvartsburg and Vladimir Kuzmiak  »View Author Affiliations

JOSA B, Vol. 27, Issue 12, pp. 2766-2773 (2010)

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A new effect of resonant tunneling of a fundamental mode of optical radiation through a subwavelength slit formed by smoothly shaped narrowing of a waveguide is examined. An effective energy transfer by evanescent waves is shown to be determined by the geometry of curvilinear narrowing. Spectra of reflectionless transmittance for waves 2.5–3 times longer than the width of the slit are found. Dependence of resonant tunneling on the geometrical parameters of narrowing and splitting of resonant maxima resulting in formation of two peaks of tunneling transmittance are demonstrated. An additional insight into the properties of narrowed waveguides has been obtained through the visualization of the variation of the field patterns associated with the modes for a specific configuration and the wavelength.

© 2010 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.7040) Optics at surfaces : Tunneling
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(050.6624) Diffraction and gratings : Subwavelength structures
(070.7345) Fourier optics and signal processing : Wave propagation

ToC Category:
Physical Optics

Original Manuscript: September 7, 2010
Manuscript Accepted: October 10, 2010
Published: November 22, 2010

Alexander Shvartsburg and Vladimir Kuzmiak, "Reflectionless tunneling of infrared radiation through subwavelength slit in a waveguide," J. Opt. Soc. Am. B 27, 2766-2773 (2010)

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