Modeling and optimization of non-periodic grating couplers

Moreno E.; Erni D.; Hafner C.Kunz RE.Vahldieck R.

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Modeling and optimization of non-periodic grating couplers

机译：Modeling and optimization of non-periodic grating couplers

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The higher degree of freedom available for non-periodic gratings (as compared with their periodic counterparts) is investigated. These non-periodic structures may be employed to design novel light couplers with increased functionality. Optimizing such devices requires a complex search in a huge parameter space. The success in the solution of this task depends on the availability of a fast forward solver and a reliable search algorithm. Here, a fast forward solver based on the multiple multipole (MMP) method together with a near-to-far field transformation and a multiple scattering calculation is presented. Thanks to the efficiency of our approach, non-periodic gratings are evaluated with a speed comparable to commonly used periodic grating approximations. This allows our solver to be combined with a heuristic global search scheme, namely an evolutionary algorithm. The procedure is demonstrated with the optimization of a non-periodic grating output coupler that suppresses an unwanted second diffracted order. [References: 27]

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《Optical and Quantum Electronics》 |2002年第11期|1051-1069|共19页
作者
Moreno E.; Erni D.; Hafner C.Kunz RE.Vahldieck R.;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学;
关键词
Evolutionary optimization; Finite grating; Grating coupler; Multiple multipole method ( mmp); Non-periodic grating; Slab waveguide; Diffractive optical-elements; Wave-guide; Size; Scattering;

Modeling and optimization of non-periodic grating couplers

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