Proposal for a 1×3 Goos-Hänchen shift-assisted de/multiplexer based on a multilayer structure containing quantum dots

A multilayer structure with the wavelength selective features based on Goos-Hänchen (GH) shift is proposed and investigated. We present a layered media containing quantum dots for active control of the GH shift for the reflected light. This configuration includes a distributed Bragg reflector to have minimum optical power transmission to the substrate. In addition, a passive cladding layer is used to enhance the total lateral shift for the reflected beams. For a fixed structure and incident angle, our results demonstrate that by proper manipulation of the optical properties and susceptibility of the active layer, de/multiplexing capabilities of such a device could be controlled. This type of grating-less device can be used as a compact wavelength division multiplexing system with actively controllable channel spacing. We demonstrate possibility of a 1×3 de/multiplexer with channel spacing of 2 nm.