https://doi.org/10.1140/epjd/e2010-00251-0
Step-like structure and assisted tunneling in two coupled modulated waveguides
Institute of Theoretical Physics and Department of Physics, Shanxi
University, 030006, Taiyuan, P.R. China
Corresponding authors: a cuijiangong002@yahoo.cn - b wdli@sxu.edu.cn
Received:
22
March
2010
Revised:
13
July
2010
Published online:
1
October
2010
The propagation of an initially-localized optical beam along two
coupled modulated waveguides is investigated. A universal step-like
structure emerges in the propagation process once
v/
~ 1 and T = 2 π/
, both for the linear and nonlinear
optical waveguides. The reason is that the coupling between the two
waveguides can be completely suppressed at z = mT or (2 m+1)T/2.
When the nonlinearity is strong, assisted tunneling can be found for
the initially-localized optical beam by slightly increasing the
strength of the modulation.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010