Manipulation of electromagnetic waves induced by pseudomagnetic fields in two dimensional photonic crystals

Many interesting phenomena, such as quantization of Landau levels and quantum Hall effect, can occur in an electronic system under a strong magnetic field. However, photons do not carry charge, they have many properties induced by external fields, either. Recently, the pseudomagnetic field, artificial synthetic gauge has attracted intense research interest classical wave systems, which propagation be manipulated like real The photonic crystal is optical structure composed periodic material distributions provides good platform for studying control electromagnetic waves. In this work, we construct uniform field introducing uniaxial linear gradient deformation metallic rods two-dimensional crystal. leads to sublattice polarization <i>n</i> = 0 level also demonstrated our simulations. Unlike fields opposite two inequivalent energy valleys, time-reversal symmetry broken. Our designed crystals support transport edge state gap between ±1 levels. propagate unidirectionally when it excited chiral source. When gaussian beam impinges on crystal, propagating paths splitting beams controlled, gives rise bend beams. Two with are assembled together, phenomenon "snake-state" obtained. proposal opens way designing information processing devices manipulating