A Study on Optimization of Waveguide Dispersion Property Using Function Expansion Based Topology Optimization Method

Hiroyuki GOTO
Yasuhide TSUJI
Takashi YASUI

IEICE TRANSACTIONS on Electronics   Vol.E97-C    No.7    pp.670-676
Publication Date: 2014/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E97.C.670
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Simulation Techniques and Their Applications for Electronics)
function expansion method,  topology optimization,  photonic crystal waveguide,  slow-light,  structural filter,  

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In this paper, the function expansion based topology optimization is employed to the automatic optimization of the waveguide dispersion property, and the optimum design of low-dispersion slow-light photonic crystal waveguides is demonstrated. In order to realize low-dispersion and large group index, an objective function to be optimized is expressed by the weighted sum of the objective functions for the desired group index and the low-dispersion property, and weighting coefficients are updated through the optimization process.