Observation of OAM sidebands due to optical reflection
arXiv:1204.4003 · doi:10.1103/PhysRevLett.109.113602
Abstract
We investigate how the orbital angular momentum (OAM) of a paraxial light beam is affected upon reflection at a planar interface. Theoretically, the unavoidable angular spread of the (paraxial) beam leads to OAM sidebands which are found to be already significant for modest beam spread (0.05). In analogy to the polarization Fresnel coefficients we develop a theory based upon spatial Fresnel coefficients; this allows straightforward prediction of the strength of the sidebands. We confirm this by experiment.
5 pages
References in corpus (5)
- 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
- Polarization, transverse shifts, and angular momentum conservation laws in partial reflection and refraction of an electromagnetic wave packet
- Goos-Hänchen and Imbert-Fedorov shifts of polarized vortex beams
- The analogy between optical beam shifts and quantum weak measurements