Band structure and reflectance for a nonlinear one-dimensional photonic crystal

TL;DR

This paper models a nonlinear one-dimensional photonic crystal with Kerr-type interfaces, analyzing how its band structure and reflectance change with incident wave intensity, revealing prohibited bands and their tunability for light control.

Contribution

It introduces a model for a nonlinear photonic crystal with Kerr interfaces, analyzing its band structure and reflectance as functions of wave intensity, highlighting tunable optical properties.

Findings

Prohibited bands appear and change with intensity.

Bands can be separated and narrowed by adjusting parameters.

Potential for designing light-controlling devices.

Abstract

We consider a model for a one-dimensional photonic crystal formed by a succession of Kerr-type equidistant spaceless interfaces immersed in a linear medium. We calculate the band structure and reflectance of this structure as a function of the incident wave intensity, and find two main behaviors: the appearance of prohibited bands, and the separation and narrowing of these bands. A system with these features is obtained by alternating very thin slabs of a soft matter material with thicker solid films, which can be used to design a device to control light propagation for specific wavelength intervals and light intensities.