Efficient four-wave mixing in four-subband semiconductor quantum wells using spatially modulated control fields with a linearly varying mixing angle

In this article, we use spatially modulated control fields to increase the four-wave mixing efficiency in a four-subband semiconductor asymmetric double quantum well, motivated by similar works in atomic systems. Using a simplified version of the propagation equations, we show analytically that for control fields with a constant amplitude and linearly varying mixing angles with the propagation distance, a conversion efficiency close to unity can be achieved even for relatively short propagation distances. Subsequently, we confirm these results by numerically simulating the full set of propagation equations.

Automated summary

This article investigates the use of spatially modulated control fields to increase the efficiency of four-wave mixing in a four-subband semiconductor asymmetric double quantum well. The results show that by using a control field with a constant amplitude and linearly varying mixing angles, near-unity conversion efficiency can be achieved even for short propagation distances.