We study the dynamics of nonlinear propagation and interaction of two optical fields in arrays of dielectric subwavelength waveguides of circular cross section. Applying the finite-difference time-domain (FDTD) method, we numerically solve the Maxwell's equations considering real values for the constitutive relations. The arrays under study include a finite number of parallel waveguides with identical parameters. In our study, we focus on the light self-trapping conditions. For that, we define the properties of the incident optical fields: complex amplitude, wavelength, angle of incidence and phase difference values. As a result, we observe the strong dependence of the energy output to input critical parameters: phase difference and angle of incidence. We conclude about the possibility to generate a single output beam. The output signal position depends on the nonlinear interaction properties and is controlled by the selection of the system parameters. These results may contribute to the development of logic gates based on subwavelength waveguides.

Date Published: 27 February 2015
PDF: 7 pages
Proc. SPIE 9371, Photonic and Phononic Properties of Engineered Nanostructures V, 937125 (27 February 2015); doi: 10.1117/12.2079632

Published in SPIE Proceedings Vol. 9371:
Photonic and Phononic Properties of Engineered Nanostructures V
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)