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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 14 — Jul. 15, 2012
  • pp: 2826–2828

Wave propagation in deep-subwavelength mode waveguides

Ken Liu, Wei Xu, Zhi Hong Zhu, Wei Min Ye, Xiao Dong Yuan, and Chun Zeng  »View Author Affiliations

Optics Letters, Vol. 37, Issue 14, pp. 2826-2828 (2012)

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This Letter proposes a dielectric waveguide with deep-subwavelength mode sizes. Results of both frequency domain and time domain analysis show that the effective mode area is below λ02/400 and can even reach λ02/1000 (λ0 is the wavelength in vacuum). The effective electrical mode area can be comparable to that of a hybrid plasmonic subwavelength confinement waveguide, with reduced optical absorption. In contrast to slot waveguides, which guide light in low-index materials, the proposed structure guides light in high-index materials. Results obtained in this Letter show that the losses are sensitive to the surface roughness on the tens of nanometers scale. The structure can be used to design ring resonators with a quality factor comparable to that of a diffraction-limited dielectric ring resonator with the same standing wave numbers. The property can be applied in nonlinear effect enhancement or laser design with ultralow threshold.

© 2012 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.6622) Integrated optics : Subsystem integration and techniques

ToC Category:
Integrated Optics

Original Manuscript: December 13, 2011
Revised Manuscript: May 1, 2012
Manuscript Accepted: May 8, 2012
Published: July 9, 2012

Ken Liu, Wei Xu, Zhi Hong Zhu, Wei Min Ye, Xiao Dong Yuan, and Chun Zeng, "Wave propagation in deep-subwavelength mode waveguides," Opt. Lett. 37, 2826-2828 (2012)

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