A study of Photonic Crystals bending waveguide laser tip for dental treatments

We propose a design and two dimensional (2D) simulation of a Photonic Crystals (PhC) slab waveguide laser tip with triangular lattices for dental treatments. The band diagram is computed in the transverse electric (TE) mode for triangular lattices of air holes in silicon substrate. The power transmission efficiencies of 90° and 120° bending structure with different sizes of defects are measured and compared with the straight waveguide. The result shows that for the bending structure, the efficiency depends relatively on both bending degree and defect size and for this particular design, the highest efficiency is achieved using the 120° structure with W2 defect.