Photonic Bandgap (PBG) Waveguide Modes
应用文章
This application note provides a general guide to calculating projected band structures of photonic bandgap (PBG) structures and defect modes. We show how to scan over the k-vector in the plane of the photonic crystal using BandSOLVE and Multi-Variable Optimization and Scanning Tool (MOST).
This example consists of a 2D cubic array of dielectric GaAs circles with refractive index of 3.4 in the XZ plane in a background material of air. The radii of the circles will be 18% of the period. A line defect is created in this lattice to form the waveguide along which modes can propagate.
This result shows the projected band structure for the defect mode in this waveguide, and is the result of scanning over the k-vector along the propagation direction.