Controlling Goos–Hänchen shift in a negative-refractive-index quantum-dot nanostructure

Abstract

The Goos-Hänchen (GH) shifts due to a negative refractive index in double quantum-dot nanostructures are discussed in reflected and transmitted light beams. It is realized that positive and negative GH shifts can be attained in the negative-refraction medium due to the presence of the indirect incoherent pumping field and electron tunneling. We found that the lateral shift at the fixed incident angle can be enhanced (positive or negative) under suitable conditions on the control field, without changing the structure of the cavity. We hope that our proposed configuration may be helpful for future all-optical sensor devices based on quantumdot nanostructures.