Advanced impedance matching in photonic crystal waveguides

Abbas Mohtashami; Javad Zarbakhsh; Kurt Hingerl

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Advanced impedance matching in photonic crystal waveguides

机译：Advanced impedance matching in photonic crystal waveguides

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摘要

We demonstrate that the dispersion of guided propagating modes in certain Photonic Crystal Waveguides (PCWGs) can be kept constant when the waveguide’s structure changes along the propagation direction. This suggests that the principle of constant group velocity matching may be utilized to improve impedance matching between different types of PCWGs while at the same time providing significant design flexibility. We illustrate this principle through the design of several efficient coupling structures between two different PCWGs via a local density of states and Fourier transform analysis of the associate electromagnetic fields. The couplers consist of heterostructures whose individual sections exhibit rather distinct structural parameters. Furthermore, we compare these structures to an adiabatic coupler.

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来源
《Optical and Quantum Electronics》 |2007年第6期|387-394|共8页
作者
Abbas Mohtashami; Javad Zarbakhsh; Kurt Hingerl;
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作者单位

Christian Doppler Labor fur Oberflachenoptische Methoden, Institut fur Halbleiter und Festkorperphysik, Universitat Linz, A-4040 Linz, Austria;

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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
Impedance matching; Photonic crystal waveguides; Group velocity; Local density of states; Design flexibility; Local dispersion; Mode coupling; Group velocity mismatch;

Advanced impedance matching in photonic crystal waveguides

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