Multichannel filters with shape designing in two-dimensional photonic crystal slabs

Ya-Zhao Liu; Shuai Feng; Jie TianCheng RenHaihua TaoZhi-Yuan LiBing-Ying ChengDao-Zhong ZhangQiang Luo

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Multichannel filters with shape designing in two-dimensional photonic crystal slabs

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摘要

We investigated the influence of the irregular shape of air holes on the optical characteristics of channel-drop filters built in a two-dimensional photonic crystal slab. Three differently shaped structures are tested by experiments and simulations to demonstrate the shape-tuning capability of the optical devices. A four-channel filter based on this shape design is presented. The photonic crystal consists of a triangular array of air holes fabricated by focused ion beam lithographic technology on a silicon slab with thickness of 260 nm. The filter contains a heterostructure with different lattice constants of 420 and 430 nm. In each channel, the filtering functionality is guaranteed by the indirect resonant coupling between waveguide and cavity. The elliptical air holes that surround the cavity have different parameters, and this leads to a fine tuning of the cavity's resonant frequencies. The performance of the multichannel filter is found to be very encouraging.

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来源
《Journal of Applied Physics》 |2007年第4期|043102.1-043102.6|共9页
作者
Ya-Zhao Liu; Shuai Feng; Jie TianCheng RenHaihua TaoZhi-Yuan LiBing-Ying ChengDao-Zhong ZhangQiang Luo;
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作者单位

Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类应用物理学;计量学;
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Multichannel filters with shape designing in two-dimensional photonic crystal slabs

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