Control Quantum Optical Effects Based On Vortex Light

Since the vortex field was proposed in 1992,people have paid more attention to it.The wavefront phase of vortex field contains helical phase factors related to orbital angular momentum?OAM?,which can be applied in the field of quantum storage and quantum information.In this paper,vortex field is introduced into the process of interaction between light and matter and we research novel phenomena induced by classical quantum optical effects such as electromagnetic induced transparency?EIT?and four-wave mixing?FWM?.The principal results are summarized as follows.First,we use a vortex field as a control field to interact with ⁸⁷Rb atoms.We proposed a new scheme for generating new structured beams via spatially dependent transparency in a three-levelatomic system.The generated beams can be controlled by inputted couple field.Due to the joint quantum interference induced by Laguerre-Gaussian?LG?field and constant coupling field,we can achieve different spatially dependent beams by measuring the probe absorption intensity profiles.The proposed scheme may provide potential applications in optics and novel quantum technologies.Next,we propose a scheme to demonstrate vortex manipulation via four-wave mixing in a four-level atomic system.Vortex as a couple field interacts with atoms.We find thatthe helical phase of the vortex field is effectively transferred to the generated FWM field via the four-wave mixing process.Interestingly,the helical phase of generated FWM field can be changedby adjusting the detuning of control field.The detailed explanation based on the dispersion relation is also given,which is in good agreement with our results.Furthermore,we perform the interference patterns of the FWM field and same-frequency Gaussian beam and present the phase modulation phenomenon on the intensity distribution of FWM field which is easier to observe experimentally.This study would be helpful to demonstrate OAM-based quantum optics and quantum information applications.Finally,we propose a scheme to generate vortex light fields through four-wave mixing in asymmetric semiconductor quantum wells.By tailoring the probe andcontrol field detuning,wecan effectively manipulate the helical phase and intensity of the FWM field.Whenprobe and control field have identical detuning,we show that both the absorption and phase twistof the generated vortex field are significantly suppressed.Consequently,highly efficient vortex FWMis realized,where the maximum conversion efficiency reaches around 50%.The process transfer vortex wavefronts from input to output fields,which may fiend potential applications in solid-state quantum optics and quantum information processing.