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    We demonstrate how vortex light generated via four-wave mixing (FWM) in a six-level atomic system can be controlled. Adjusting the relative phase of driving fields allows tuning of the vortex FWM field

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    Area of Science:

    • Atomic physics
    • Quantum optics
    • Nonlinear optics

    Background:

    • Vortex light carries orbital angular momentum (OAM).
    • Four-wave mixing (FWM) is a nonlinear optical process.
    • Atomic systems offer unique platforms for light-matter interactions.

    Purpose of the Study:

    • Investigate the orbital angular momentum of vortex light in a specific atomic system.
    • Explore the influence of driving fields on vortex light properties.
    • Determine methods for controlling vortex light characteristics.

    Main Methods:

    • Utilized a six-level atomic system with a closed-loop configuration.
    • Generated vortex light via four-wave mixing (FWM).
    • Analyzed the sensitivity of FWM to relative phase, microwave field intensity, and driving field detuning.

    Main Results:

    • Vortex FWM field is sensitive to the relative phase of driving fields in a closed-loop system.
    • Phase and intensity of vortex FWM can be periodically tuned by adjusting driving field relative phase.
    • Spatial modulation of vortex FWM phase and intensity achieved by tuning microwave field intensity and driving field detuning.

    Conclusions:

    • The proposed system offers a method for controlled generation and manipulation of vortex light.
    • Relative phase control provides a pathway for tuning vortex light properties.
    • Tunable vortex FWM fields have potential applications in optical manipulation and information processing.