Ultrashort and Low-Loss Polarization Rotators Utilizing Hybrid Plasmonic-Dielectric Couplers

Ultrashort and Low-Loss Polarization Rotators Utilizing Hybrid Plasmonic-Dielectric Couplers
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采用混合等离激元电介质耦合器的超短、低损耗偏振旋转器

DOI:
10.1109/lpt.2014.2365294
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发表时间:
2015-02
影响因子:
2.6
通讯作者:
Li Hongbin
Li Hongbin
中科院分区:
工程技术3区
文献类型:
--
作者:
Yin Mei;Deng Qingzhong;Li Yanping;Wang Xingjun;Li Hongbin

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在这封信中,我们提出了一种混合等离子体激元偏振旋转器(PR)利用混合等离子体激元波导和条形Si介质波导(DW)之间的非对称定向耦合,其具有超紧凑的尺寸,低插入损耗(IL),和绝缘体上硅的兼容性。耦合长度仅为11.2 μm,远小于基于同一硅芯层上两个具有相同耦合间隙的带状分布波导之间的非对称定向耦合的PR。所提出的PR在1550 nm处显示出99.9%的高偏振转换效率(PCE),IL为0.136 dB,这在所报道的等离子体PR中是极低的。在60 nm带宽上,PCE优于96%,IL低于0.42dB。
In this letter, we propose a hybrid plasmonic polarization rotator (PR) utilizing asymmetrical directional coupling between a hybrid plasmonic waveguide and a strip Si dielectric waveguide (DW), which features ultracompact size, low insertion loss (IL), and silicon-on-insulator compatibility. The coupling length is only 11.2 μm, much shorter than the PRs based on asymmetrical directional coupling between two strip DWs on the same silicon core layer with the same coupling gap. The presented PR shows a high polarization conversion efficiency (PCE) of 99.9% at 1550 nm with an IL of 0.136 dB, which is extremely low in the reported plasmonic PRs. In addition, it yields the PCE better than 96% and the IL lower than 0.42 dB over a bandwidth of 60 nm.
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发表时间: 2014-03
影响因子: 2.6
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