Transverse Shifts and Time Delays of Spatiotemporal Vortex Pulses Reflected and Refracted at a Planar Interface
arXiv:2105.12805 · doi:10.1515/nanoph-2021-0294
Abstract
Transverse (Hall-effect) and Goos--Hänchen shifts of light beams reflected/refracted at planar interfaces are important wave phenomena, which can be significantly modified and enhanced by the presence of intrinsic orbital angular momentum (OAM) in the beam. Recently, optical spatiotemporal vortex pulses (STVPs) carrying a purely transverse intrinsic OAM were predicted theoretically and generated experimentally. Here we consider the reflection and refraction of such pulses at a planar isotropic interface. We find theoretically and confirm numerically novel types of the OAM-dependent transverse and longitudinal pulse shifts. Remarkably, the longitudinal shifts can be regarded as time delays, which appear, in contrast to the well-known Wigner time delay, without temporal dispersion of the reflection/refraction coefficients. Such time delays allow one to realize OAM-controlled slow (subluminal) and fast (superluminal) pulse propagation without medium dispersion. These results can have important implications in various problems involving scattering of localized vortex states carrying transverse OAM.
arXiv comment7 pages, 4 figures, to appear in Nanophotonics
References in corpus (25)
- Spin-orbit interactions of light
- Hall Effect of Light
- Conservation of Angular Momentum, Transverse Shift, and Spin Hall Effect in Reflection and Refraction of Electromagnetic Wave Packet
- Goos-Hänchen and Imbert-Fedorov beam shifts: An overview
- Photonic Cyclone: spatiotemporal optical vortex with controllable transverse orbital angular momentum
- Role of beam propagation in Goos-Hänchen and Imbert-Fedorov shifts
- Diffraction-free space-time beams
- Free-space propagation of spatio-temporal optical vortices (STOVs)
- Spatio-temporal vortex beams and angular momentum
- Spatio-temporal optical vortices
- Weak Measurements of Light Chirality with a Plasmonic Slit
- Geometrical Optics of Beams with Vortices: Berry Phase and Orbital Angular Momentum Hall Effect
- How orbital angular momentum affects beam shifts in optical reflection
- Spatiotemporal Vortex Pulses: Angular Momenta and Spin-Orbit Interaction
- Goos-Hänchen and Imbert-Fedorov shifts of polarized vortex beams
- Spin-Hall effect and circular birefringence of a uniaxial crystal plate
- Weak measurement of the Goos-Hanchen shift
- Topological aberration of optical vortex beams and singularimetry of dielectric interfaces
- Goos-Hänchen and Imbert-Fedorov shifts from a quantum-mechanical perspective
- Relativistic Hall Effect
- Generalized shifts and weak values for polarization components of reflected light beams
- Symmetric and asymmetric solitons and vortices in linearly coupled two-dimensional waveguides with the cubic-quintic nonlinearity
- Photonic orbital angular momentum with controllable orientation
- Anomalous time delays and quantum weak measurements in optical micro-resonators
- Limits to superweak amplification of beam shifts