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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3903–3905

Optical waveguide mode control by nanoslit-enhanced terahertz field

A. Novitsky, M. Zalkovskij, R. Malureanu, P. U. Jepsen, and A. V. Lavrinenko  »View Author Affiliations

Optics Letters, Vol. 37, Issue 18, pp. 3903-3905 (2012)

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In this Letter we propose a scheme providing control over an optical waveguide mode by a terahertz (THz) wave. The scheme is based on an optimization of the overlap between the optical waveguide mode and the THz field, with the THz field strength enhanced by the presence of a metallic nanoslit surrounding the waveguide. We find an optimum balance between the optical mode attenuation and Kerr-induced change in the propagation constant. The criterion for a π/2-cumulative phase shift, for instance for application in a Mach–Zehnder interferometer configuration, requires 10kV/cm THz field, which in turn is estimated to result in a nonlinear change of the refractive index in the waveguide of 0.001. Our simulations prove that it is quite reasonable to observe the effect experimentally.

© 2012 Optical Society of America

OCIS Codes
(190.3270) Nonlinear optics : Kerr effect
(190.4360) Nonlinear optics : Nonlinear optics, devices

ToC Category:
Nonlinear Optics

Original Manuscript: July 4, 2012
Manuscript Accepted: July 31, 2012
Published: September 14, 2012

A. Novitsky, M. Zalkovskij, R. Malureanu, P. U. Jepsen, and A. V. Lavrinenko, "Optical waveguide mode control by nanoslit-enhanced terahertz field," Opt. Lett. 37, 3903-3905 (2012)

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