Highly compact circulators in square-lattice photonic crystal waveguides.
We propose, demonstrate and investigate highly compact circulators with ultra-low insertion loss in square-lattice- square-rod-photonic-crystal waveguides. Only a single magneto- optical square rod is required to be inserted into the cross center of waveguides, making the structure very compact and...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0113508&type=printable |
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| author | Xin Jin Zhengbiao Ouyang Qiong Wang Mi Lin Guohua Wen Jingjing Wang |
| author_facet | Xin Jin Zhengbiao Ouyang Qiong Wang Mi Lin Guohua Wen Jingjing Wang |
| author_sort | Xin Jin |
| collection | DOAJ |
| description | We propose, demonstrate and investigate highly compact circulators with ultra-low insertion loss in square-lattice- square-rod-photonic-crystal waveguides. Only a single magneto- optical square rod is required to be inserted into the cross center of waveguides, making the structure very compact and ultra efficient. The square rods around the center defect rod are replaced by several right-angled-triangle rods, reducing the insertion loss further and promoting the isolations as well. By choosing a linear-dispersion region and considering the mode patterns in the square magneto-optical rod, the operating mechanism of the circulator is analyzed. By applying the finite-element method together with the Nelder-Mead optimization method, an extremely low insertion loss of 0.02 dB for the transmitted wave and ultra high isolation of 46 dB∼48 dB for the isolated port are obtained. The idea presented can be applied to build circulators in different wavebands, e.g., microwave or Tera-Hertz. |
| format | Article |
| id | doaj-art-eda74e68bcd74916a22ff78a9235390d |
| institution | OA Journals |
| issn | 1932-6203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-eda74e68bcd74916a22ff78a9235390d2025-08-20T02:14:50ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-01911e11350810.1371/journal.pone.0113508Highly compact circulators in square-lattice photonic crystal waveguides.Xin JinZhengbiao OuyangQiong WangMi LinGuohua WenJingjing WangWe propose, demonstrate and investigate highly compact circulators with ultra-low insertion loss in square-lattice- square-rod-photonic-crystal waveguides. Only a single magneto- optical square rod is required to be inserted into the cross center of waveguides, making the structure very compact and ultra efficient. The square rods around the center defect rod are replaced by several right-angled-triangle rods, reducing the insertion loss further and promoting the isolations as well. By choosing a linear-dispersion region and considering the mode patterns in the square magneto-optical rod, the operating mechanism of the circulator is analyzed. By applying the finite-element method together with the Nelder-Mead optimization method, an extremely low insertion loss of 0.02 dB for the transmitted wave and ultra high isolation of 46 dB∼48 dB for the isolated port are obtained. The idea presented can be applied to build circulators in different wavebands, e.g., microwave or Tera-Hertz.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0113508&type=printable |
| spellingShingle | Xin Jin Zhengbiao Ouyang Qiong Wang Mi Lin Guohua Wen Jingjing Wang Highly compact circulators in square-lattice photonic crystal waveguides. PLoS ONE |
| title | Highly compact circulators in square-lattice photonic crystal waveguides. |
| title_full | Highly compact circulators in square-lattice photonic crystal waveguides. |
| title_fullStr | Highly compact circulators in square-lattice photonic crystal waveguides. |
| title_full_unstemmed | Highly compact circulators in square-lattice photonic crystal waveguides. |
| title_short | Highly compact circulators in square-lattice photonic crystal waveguides. |
| title_sort | highly compact circulators in square lattice photonic crystal waveguides |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0113508&type=printable |
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