Complete achromatic optical switching between two waveguides with a sign flip of the phase mismatch

Wei Huang, Andon A. Rangelov, and Elica Kyoseva
Phys. Rev. A 90, 053837 – Published 19 November 2014

Abstract

We present a two-waveguide coupler which realizes complete achromatic all-optical switching. The coupling of the waveguides has a hyperbolic-secant shape, while the phase mismatch has a sign flip at the maximum of the coupling. We derive an analytic solution for the electric field propagation using coupled-mode theory and show that the light switching is robust against small to moderate variations in the coupling strength and phase mismatch. Thus, we realize an achromatic light switching between the two waveguides. We further consider the extended case of three coupled waveguides in an array and pay special attention to the case of equal bidirectional achromatic light beam splitting.

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  • Received 25 September 2014

DOI:https://doi.org/10.1103/PhysRevA.90.053837

©2014 American Physical Society

Authors & Affiliations

Wei Huang1, Andon A. Rangelov1,2, and Elica Kyoseva1

  • 1Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682 Singapore
  • 2Department of Physics, Sofia University, James Bourchier 5 Boulevard, 1164 Sofia, Bulgaria

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Issue

Vol. 90, Iss. 5 — November 2014

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