Orbital angular momentum (OAM) is an important property of vortex light, which provides a valuable tool to manipulate the light-matter interaction in the study of classical and quantum optics. Here we propose a scheme to generate vortex light fields via four-wave mixing (FWM) in asymmetric semiconductor quantum wells. By tailoring the probe-field and control-field detunings, we can effectively manipulate the helical phase and intensity of the FWM field. Particularly, when probe field and control field have identical detuning, we find that both the absorption and phase twist of the generated FWM field are significantly suppressed. Consequently, the highly efficient vortex FWM is realized, where the maximum conversion efficiency reaches around 50%. Our study provides a tool to transfer vortex wavefronts from input to output fields in an efficient way, which may find potential applications in solid-state quantum optics and quantum information processing.

中文翻译：

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非对称半导体量子阱中的高效涡流四波混合。

轨道角动量（OAM）是涡旋光的重要属性，它为经典光学和量子光学的研究提供了一种有价值的工具，可操纵光与物质的相互作用。在这里，我们提出了一种在非对称半导体量子阱中通过四波混合（FWM）产生涡旋光场的方案。通过调整探测场和控制场的失谐，我们可以有效地控制FWM场的螺旋相位和强度。特别地，当探测场和控制场具有相同的失谐时，我们发现所产生的FWM场的吸收和相位扭曲都得到了显着抑制。因此，实现了高效涡流FWM，其中最大转换效率达到50％左右。