Swapping of orbital angular momentum states of light in a quantum well waveguideSeyyed Hossein Asadpour, Edris Faizabadi, Viaceslav Kudriašov, Emmanuel Paspalakis and Hamid. R. HamediEur. Phys. J. Plus, 136 4 (2021) 457DOI: https://doi.org/10.1140/epjp/s13360-021-01461-5