Systematic design of loss-engineered slow-light waveguides

被引：21

作者：

Wang, Fengwen ^{[1
]}

Jensen, Jakob Sondergaard ^{[1
]}

Mork, Jesper ^{[2
]}

Sigmund, Ole ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Dept Photon Engn, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2012年 / 29卷 / 12期

关键词：

TOPOLOGY OPTIMIZATION; PHOTONIC CRYSTALS; RADIATION LOSSES; DISPERSION; SILICON;

D O I：

10.1364/JOSAA.29.002657

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper employs topology optimization to systematically design free-topology loss-engineered slow-light waveguides with enlarged group index bandwidth product (GBP). The propagation losses of guided modes are evaluated by the imaginary part of eigenvalues in complex band structure calculations, where the scattering losses due to manufacturing imperfections are represented by an edge-related effective dissipation. The loss engineering of slow-light waveguides is realized by minimizing the propagation losses of design modes. Numerical examples illustrate that the propagation losses of free-topology dispersion-engineered waveguides can be significantly suppressed by loss engineering. Comparisons between fixed- and free-topology loss-engineered waveguides demonstrate that the GBP can be enhanced significantly by the free-topology loss-engineered waveguides with a small increase of the propagation losses. (c) 2012 Optical Society of America

引用

页码：2657 / 2666

页数：10

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