Abstract
Pseudospin describes how waves are distributed between different “internal” degrees of freedom or microscopic states, such as polarizations, sublattices, or layers. Here, we experimentally demonstrate and explain wave dynamics in a photonic Lieb lattice, which hosts an integer pseudospin conical intersection. We study the most striking differences displayed by integer pseudospin states: pseudospin-dependent conical diffraction and the generation of higher charged optical vortices.
- Received 13 October 2015
DOI:https://doi.org/10.1103/PhysRevLett.116.183902
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Three-Way Spin in Photonic Lattice
Published 4 May 2016
An array of optical waveguides bestows light waves with three spin-like states, which are observable in cone- and vortex-shaped diffraction patterns.
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