Optical resonator analog of a two-dimensional topological insulator
A lattice of optical ring resonators can exhibit a topological insulator phase, with the role of spin played by the direction of propagation of light within each ring. Unlike the system studied by Hafezi et al., [Nat. Phys. 7 907 (2011)] topological protection is achieved without fine-tuning the int...
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/95754 http://hdl.handle.net/10220/10203 |
| _version_ | 1826119010472689664 |
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| author | Liang, Guanquan Chong, Yidong |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Liang, Guanquan Chong, Yidong |
| author_sort | Liang, Guanquan |
| collection | NTU |
| description | A lattice of optical ring resonators can exhibit a topological insulator phase, with the role of spin played by the direction of propagation of light within each ring. Unlike the system studied by Hafezi et al., [Nat. Phys. 7 907 (2011)] topological protection is achieved without fine-tuning the interresonator couplings, which are given the same periodicity as the underlying lattice. The topological insulator phase occurs for strong couplings, when the tight-binding method is inapplicable. Using the transfer matrix method, we derive the band structure and phase diagram, and demonstrate the existence of robust edge states. When gain and loss are introduced, the system functions as a diode for coupled resonator modes. |
| first_indexed | 2024-10-01T04:53:02Z |
| format | Journal Article |
| id | ntu-10356/95754 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:53:02Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/957542023-02-28T19:24:32Z Optical resonator analog of a two-dimensional topological insulator Liang, Guanquan Chong, Yidong School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Physical chemistry A lattice of optical ring resonators can exhibit a topological insulator phase, with the role of spin played by the direction of propagation of light within each ring. Unlike the system studied by Hafezi et al., [Nat. Phys. 7 907 (2011)] topological protection is achieved without fine-tuning the interresonator couplings, which are given the same periodicity as the underlying lattice. The topological insulator phase occurs for strong couplings, when the tight-binding method is inapplicable. Using the transfer matrix method, we derive the band structure and phase diagram, and demonstrate the existence of robust edge states. When gain and loss are introduced, the system functions as a diode for coupled resonator modes. Published version 2013-06-11T07:51:58Z 2019-12-06T19:20:50Z 2013-06-11T07:51:58Z 2019-12-06T19:20:50Z 2013 2013 Journal Article Liang, G. Q. & Chong, Y. (2013). Optical resonator analog of a two-dimensional topological insulator. Physical review letters, 110(20). 0031-9007 https://hdl.handle.net/10356/95754 http://hdl.handle.net/10220/10203 10.1103/PhysRevLett.110.203904 173100 en Physical review letters © 2013 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: [http://dx.doi.org/10.1103/PhysRevLett.110.203904]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Chemistry::Physical chemistry Liang, Guanquan Chong, Yidong Optical resonator analog of a two-dimensional topological insulator |
| title | Optical resonator analog of a two-dimensional topological insulator |
| title_full | Optical resonator analog of a two-dimensional topological insulator |
| title_fullStr | Optical resonator analog of a two-dimensional topological insulator |
| title_full_unstemmed | Optical resonator analog of a two-dimensional topological insulator |
| title_short | Optical resonator analog of a two-dimensional topological insulator |
| title_sort | optical resonator analog of a two dimensional topological insulator |
| topic | DRNTU::Science::Chemistry::Physical chemistry |
| url | https://hdl.handle.net/10356/95754 http://hdl.handle.net/10220/10203 |
| work_keys_str_mv | AT liangguanquan opticalresonatoranalogofatwodimensionaltopologicalinsulator AT chongyidong opticalresonatoranalogofatwodimensionaltopologicalinsulator |