Title :
High-efficiency defect-based photonic-crystal tapers designed by a genetic algorithm
Author :
Håkansson, Andreas ; Sanchis, Pablo ; Sánchez-Dehesa, José ; Martí, Javier
Author_Institution :
Nanophotonics Technol. Center, Univ. Politecnica de Valencia, Spain
Abstract :
A method based on a genetic algorithm (GA) is used to design the optimum configuration of defects that when put within a photonic-crystal (PhC) taper improve the coupling efficiency between dielectric and PhC waveguides (WGs). This approach optimizes the whole configuration of defects simultaneously and, therefore, takes into account the correlation among the defects. Transmission efficiencies up to 94% have been predicted for a 3-μm-wide dielectric WG into a single-line-defect PhC-WG. This result significantly improves the transmission efficiency of the same PhC taper without defects. The influence on the coupling efficiency of the PhC taper length and geometry are also discussed.
Keywords :
genetic algorithms; optical couplers; optical design techniques; optical waveguides; photonic crystals; coupling efficiency; dielectric waveguide; genetic algorithm; photonic crystal taper design; photonic crystal waveguide; transmission efficiency; Algorithm design and analysis; Coupling circuits; Design optimization; Dielectric losses; Frequency; Genetic algorithms; Particle scattering; Photonic crystals; Photonic integrated circuits; Propagation losses; Coupling; genetic algorithms; inverse design; multiple scattering; optimization; photonic crystals; photonic integrated circuits;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.857760
