Pseudospin is an angular momentum degree of freedom introduced in analogy to the real electron spin in the effective massless Dirac-like equation used to describe wave evolution at conical intersections such as the Di...Pseudospin is an angular momentum degree of freedom introduced in analogy to the real electron spin in the effective massless Dirac-like equation used to describe wave evolution at conical intersections such as the Dirac cones of graphene.Here,we study a photonic implementation of a chiral borophene allotrope hosting a pseudospin-2 conical intersection in its energy-momentum spectrum.The presence of this fivefold spectral degeneracy gives rise to quasiparticles with pseudospin up to±2.We report on conical diffraction and pseudospin-orbit interaction of light in photonic chiral borophene,which,as a result of topological charge conversion,leads to the generation of highly charged optical phase vortices.展开更多
文摘Pseudospin is an angular momentum degree of freedom introduced in analogy to the real electron spin in the effective massless Dirac-like equation used to describe wave evolution at conical intersections such as the Dirac cones of graphene.Here,we study a photonic implementation of a chiral borophene allotrope hosting a pseudospin-2 conical intersection in its energy-momentum spectrum.The presence of this fivefold spectral degeneracy gives rise to quasiparticles with pseudospin up to±2.We report on conical diffraction and pseudospin-orbit interaction of light in photonic chiral borophene,which,as a result of topological charge conversion,leads to the generation of highly charged optical phase vortices.
