Bistable near field and bistable transmittance in 2D composite slab consisting of nonlocal core-Kerr shell inclusions

Abstract

We carry out a theoretical study on optical bistability of near field intensity and transmittance in two-dimensional nonlinear composite slab. This kind of 2D composite is composed of nonlocal metal/Kerr-type dielectric core-shell inclusions randomly embedded in the host medium, and we derivate the nonlinear relation between the field intensity in the shell of inclusions and the incident field intensity with self-consistent mean field approximation. Numerical demonstration has been performed to show the viable parameter space for the bistable near field. We show that nonlocality can provide broader region in geometric parameter space for bistable near field as well as bistable transmittance of the nonlocal composite slab compared to local case. Furthermore, we investigate the bistable transmittance in wavelength spectrum, and find that besides the input intensity, the wavelength operation could as well make the transmittance jump from a high value to a low one. This kind of self-tunable nano-composite slab might have potential application in optical switching devices.

Nonlocality-Broaden Optical Bistability in a Nonlinear Plasmonic Core–Shell Cylinder

“…A valid parameter region for bistability can be achieved in Figure with numerical methods. Besides that, Figure also shows the results of the nonlocal quasistatic case, which we report elsewhere . It demonstrates that the valid parameter space for OB in the nonlocal case is much broader than the local one, especially in the low η region.…”

“…Besides that, Figure 5 also shows the results of the nonlocal quasistatic case, which we report elsewhere. 49 It demonstrates that the valid parameter space for OB in the nonlocal case is much broader than the local one, especially in the low η region. Although derived by the quasistatic approximation, its derivation from full wave Hence it provides a way to search the potential OB in this kind of core−shell cylinder by checking its resonant wavelength.…”