Total Internal Reflection of Orbital Angular Momentum Beams

Abstract

We investigate how beams with orbital angular momentum (OAM) behave under total internal reflection. This is studied in two complementary experiments: In the first experiment, we study geometric shifts of OAM beams upon total internal reflection (Goos-Hänchen and Imbert-Fedorov shifts, for each the spatial and angular variant), and in the second experiment we determine changes in the OAM mode spectrum of a beam, again upon total internal reflection. As a result we find that in the first case, the shifts are independent of OAM and beam focussing, while in the second case, modifications in the OAM spectrum occur which depend on the input OAM mode as well as on the beam focussing. This is investigated by experiment and theory. We also show how the two methods, beam shifts on the one hand, and OAM spectrum changes on the other, are related theoretically.

9 pages, 4 figures

References in corpus (6)

• Conservation of Angular Momentum, Transverse Shift, and Spin Hall Effect in Reflection and Refraction of Electromagnetic Wave Packet
• Role of beam propagation in Goos-Hänchen and Imbert-Fedorov shifts
• Quantum Goos-Hanchen effect in graphene
• How orbital angular momentum affects beam shifts in optical reflection
• Topological aberration of optical vortex beams and singularimetry of dielectric interfaces
• Observation of OAM sidebands due to optical reflection

Cited by in corpus (3)

• Non-integer OAM beam shifts of Hermite-Laguerre-Gaussian beams
• An experiment on the shifts of reflected C-lines
• Second-order nonlocal shifts of scattered wave-packets: What can be measured by Goos-Hänchen and Imbert-Fedorov effects ?