Open AccessAdjoint-based optimization of active nanophotonic devices
Author(s) -
Jiahui Wang,
Yu Shi,
Tyler W. Hughes,
Zhexin Zhao,
Shanhui Fan
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.003236
Subject(s) - nanophotonics , optics , finite difference time domain method , reduction (mathematics) , isolator , optical isolator , sensitivity (control systems) , insertion loss , computer science , materials science , physics , electronic engineering , mathematics , geometry , optical fiber , engineering
We show that the adjoint variable method can be combined with the multi-frequency finite-difference frequency-domain method for efficient sensitivity calculations, enabling the systematic optimization of active nanophotonic devices. As a proof of principle demonstration, we have optimized a dynamic isolator structure in two-dimensions, resulting in the reduction of the length of the modulated regions by a factor of two, while retaining good performance in the isolation ratio and insertion loss.