Abstract
•The photonic crystal used consists of alumina rods in air.•We created a waveguide in a crystal PCW.•A V_shaped defect is added inside the PCW to provide asymmetric light transport.•Field snapshots and transmission spectra are presented.
We present an asymmetric light transport in a modified U-shaped photonic crystal waveguide (PCW). The compact waveguides consist of coupling two L-waveguides in a PC formed by dielectric rods in air arranged in a square lattice. We show that the transmitted power flow depends on the direction of the incident light, the transmission varies between a high and low value upon switching the position of the source beam from the input to the output of the PCW. Computations are performed using the plane wave expansion and finite-difference time-domain methods.