Transverse angular momentum in topological photonic crystals
arXiv:1709.04615 · doi:10.1088/2040-8986/aa9b06
Abstract
Engineering local angular momentum of structured light fields in real space enables unprecedented applications in many fields, in particular for the realization of unidirectional robust transport in topological photonic crystals with non-trivial Berry vortex in momentum space. Here, we show transverse angular momentum modes in silicon topological photonic crystals when considering transverse electric polarization. Excited by a chiral external source with either transverse spin or orbital angular momentum, robust light flow propagating along opposite directions was observed in several kinds of sharp-turn interfaces between two topologically-distinct silicon photonic crystals. A transverse orbital angular momentum mode with alternating-sign topological charge was found at the boundary of such two photonic crystals. In addition, we also found that unidirectional transport is robust to the working frequency even when the ring-size or location of pseudo-spin source varies in a certain range, leading to the superiority of broadband photonic device. These findings enable for making use of transverse angular momentum, a kind of degree of freedom, to achieve unidirectional robust transport in telecom region and other potential applications in integrated photonic circuits such as on-chip robust delay line.
arXiv comment17 pages, 5 figures
References in corpus (27)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Entanglement of Orbital Angular Momentum States of Photons
- Photonic Floquet Topological Insulators
- Spin-orbit interactions of light
- Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
- Imaging topological edge states in silicon photonics
- Chiral Quantum Optics
- Scheme to Achieve Silicon Topological Photonics
- Reflection-Free One-Way Edge Modes in a Gyromagnetic Photonic Crystal
- Experimental observation of Weyl points
- Transverse and longitudinal angular momenta of light
- Quantum spin Hall effect of light
- Deterministic photon-emitter coupling in chiral photonic circuits
- Experimental realization of photonic topological insulator in a uniaxial metacrystal waveguide
- Valley Vortex States in Sonic Crystals
- Valley-protected backscattering suppression in silicon photonic graphene
- Valley-contrasting orbital angular momentum in photonic valley crystals
- Three-dimensional topological photonic crystal with a single surface Dirac cone
- Topological Photonic Phase in Chiral Hyperbolic Metamaterials
- Transverse spin and momentum in two-wave interference
- Optical Momentum, Spin, and Angular Momentum in Dispersive Media
- Polarization engineering in photonic crystal waveguides for spin-photon entanglers
- Pseudo-time-reversal symmetry and topological edge states in two-dimensional acoustic crystals
- Photonic simulation of topological excitations in metamaterials
- Topological Invariants in Point Group Symmetric Photonic Topological Insulators
- Spatial Distribution of Phase Singularities in Optical Random Vector Waves
- Exciting Reflectionless Unidirectional Edge Modes in a Reciprocal Photonic Topological Insulator Medium
Cited by in corpus (5)
- Topological photonic crystals: physics, designs and applications
- Exciting Pseudospin Dependent Edge States in Plasmonic Metasurfaces
- Near- and Far-Field Excitation of Topological Plasmonic Metasurfaces
- Breakdown of spin-to-helicity locking at the nanoscale in topological photonic crystal edge states
- Inverse design of dual-band valley-Hall topological photonic crystals with arbitrary pseudospin states