Orbital Angular Momentum of Photons12OutlineGetting started on Orbital Angular Momentum of LightMaking helical phasefrontsApplicationConclusions3OutlineGetting started on Orbital Angular Momentum of LightMaking helical phasefronts ApplicationConclusions4Getting started on Orbital Angular Momentum of LightProfessor Les Allen A1.Pioneering work 5Getting started on Orbital Angular Momentum of LightFormalism:A1.Pioneering work 6Getting started on Orbital Angular Momentum of LightFor a linearly polar