Efficient coupling of light between single-mode waveguides and supercollimating photonic crystals

被引：0
作者：
Vynck, K. [1 ]
Centeno, E. [1 ]
d'Yerville, M. Le Vassor [1 ]
Cassagne, D. [1 ]
机构：
[1] Univ Montpellier 2, Etud Semicond Grp, CNRS, UMR 5650, F-34095 Montpellier 05, France
来源：
PHOTONIC CRYSTAL MATERIALS AND DEVICES VIII | 2008年 / 6989卷
关键词：
photonic crystals; supercollimation; coupling; mode matching; impedance matching; rib waveguides; strip waveguides;
D O I：
10.1117/12.781135
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We study the coupling of light between strip and rib waveguides and supercollimating photonic crystals on silicon-on-insulator substrates. The dispersive properties of the supercollimating photonic crystal are used to define the design requirements on the excitation waveguide and the boundary of the photonic crystal is optimized to improve the impedance matching between the two structures. By 3D calculations, we find that rib waveguides can yield transmission efficiencies up to about 96 % and reflections lower than 0.2 % at wavelengths close to 1.55 pm, while insuring single-mode propagation. This work therefore constitutes an important step toward the integration of supercollimation- based optical circuits on photonic chips.
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页数：8
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