Helical phase modulation via four-wave mixing in a graphene system

We propose a scheme that transfers the helical phase information of the orbital angular momentum (OAM) light-via a graphene system-to the generated four-wave mixing (FWM) field. In particular, the helical phase of the FWM field can be effectively manipulated and suppressed, if desired, by adjusting the system parameters. Moreover, we identify and examine the evolution of the helical phase via the superposition modes of the FWM field and a same-frequency Gaussian beam, which is in good agreement with the results of numerical simulations. In this way, our proposed scheme may provide a route to modulate the helical phase wavefront via FWM in graphene-based materials.

Automated summary

We propose a scheme to transfer the helical phase information of OAM light to the generated FWM field via a graphene system, and manipulate and suppress the helical phase of the FWM field by adjusting the system parameters. The evolution of the helical phase is identified and examined through superposition modes of the FWM field and a Gaussian beam, showing good agreement with numerical simulations. This scheme provides a potential route to modulate the helical phase wavefront via FWM in graphene-based materials.