Investigation of a channel-add/drop-filtering device using acceptor-type point defects in a two-dimensional photonic-crystal slab
Investigation of a channel-add/drop-filtering device using acceptor-type point defects in a two-dimensional photonic-crystal slab
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DOI：
10.1063/1.1592890
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发表时间：
2003-07
影响因子：
4
通讯作者：
T. Asano;B. Song;Yoshinori Tanaka;S. Noda
中科院分区：
文献类型：
--
作者：
T. Asano;B. Song;Yoshinori Tanaka;S. Noda
本文研究了一种利用二维光子晶体板中点缺陷和线缺陷的通道分离滤波器。光从线缺陷波导通过点缺陷腔进入自由空间的效率大于45%，这非常接近器件的理论最大值。反向功能的设备（通道添加过滤）也被证明，从自由空间的点缺陷上入射的光子被共振捕获，并转移到附近的线缺陷波导。加入滤波的频谱特性和偏振特性与分出滤波的频谱特性和偏振特性完全一致。结果表明，二维光子晶体板是实现超小型光学功能器件的理想材料。
A channel-drop-filtering device using point and line defects in a two-dimensional photonic-crystal slab is investigated. The efficiency to drop light from a line-defect waveguide to the free space via a point-defect cavity is found to be more than 45%, which is very close to the theoretical maximum of the device. The reverse function of the device (channel-add-filtering) is also demonstrated, where photons incident on a point defect from free space are resonantly trapped and transferred to a line-defect waveguide nearby. The spectrum and polarization characteristic of the add-filtering completely agree with those of the drop-filtering. The results indicate that two-dimensional photonic slabs are very promising for realizing ultrasmall optical functional devices.