Please use this identifier to cite or link to this item:
|Title:||Optical resonator analog of a two-dimensional topological insulator||Authors:||Liang, Guanquan
|Keywords:||DRNTU::Science::Chemistry::Physical chemistry||Issue Date:||2013||Source:||Liang, G. Q. & Chong, Y. (2013). Optical resonator analog of a two-dimensional topological insulator. Physical review letters, 110(20).||Series/Report no.:||Physical review letters||Abstract:||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.||URI:||https://hdl.handle.net/10356/95754
|ISSN:||0031-9007||DOI:||http://dx.doi.org/10.1103/PhysRevLett.110.203904||Rights:||© 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.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.