Topological bound modes in optical waveguide arrays with alternating positive and negative couplings
We investigate the topological bound modes in a binary waveguide array with alternating positive and negative couplings. The negative coupling is realized by incorporating additional waveguides into the bare array and suitably tuning the refractive index. We show the band structures close and Dirac...
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| Veröffentlicht in: | Optical and quantum electronics 2020-02, Vol.52 (2), Article 61 |
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| creator | Fu, Nianzu Fu, Ziwei Zhang, Huaiyuan Liao, Qing Zhao, Dong Ke, Shaolin |
| description | We investigate the topological bound modes in a binary waveguide array with alternating positive and negative couplings. The negative coupling is realized by incorporating additional waveguides into the bare array and suitably tuning the refractive index. We show the band structures close and Dirac point emerges at the Brillouin zone center when the absolute values of real and negative couplings are equal, indicating topological phase transition. The topological bound modes emerge at the edge of topological non-trivial arrays or at the interface of two arrays with different topologies. Moreover, we show the topological bound mode can be isolated from the trivial defect mode by tuning the coupling strength, which is reflected from wave propagation. The study provides a promising approach to realizing robust light transport. |
| doi_str_mv | 10.1007/s11082-019-2178-0 |
| format | Article |
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The study provides a promising approach to realizing robust light transport.</description><subject>Arrays</subject><subject>Brillouin zones</subject><subject>Characterization and Evaluation of Materials</subject><subject>Computer Communication Networks</subject><subject>Couplings</subject><subject>Electrical Engineering</subject><subject>Lasers</subject><subject>Optical Devices</subject><subject>Optical waveguides</subject><subject>Optics</subject><subject>Phase transitions</subject><subject>Photonics</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Refractivity</subject><subject>Topology</subject><subject>Tuning</subject><subject>Wave propagation</subject><issn>0306-8919</issn><issn>1572-817X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kE1LxDAQhoMouK7-AG8Bz9WZpG3aoyx-wYKXFbyFtMnWLN2mJu0u--_NbgVPnoaZeZ5heAm5RbhHAPEQEKFgCWCZMBRFAmdkhplgSYHi85zMgEOeFCWWl-QqhA0A5GkGM6JXrneta2ytWlq5sdN067QJ1HbU9cNpvFc704xWG6q8V4dA93b4oqodjO_UYLuG9i7Ywe4iEP3ONOrU1G7s27gO1-Rirdpgbn7rnHw8P60Wr8ny_eVt8bhMao75kFRc61RzbpiuRa3WtVZpXmbIIM8qXVZYp8YIqDA1LOfCVMiUQBRplWmRZ5zPyd10t_fuezRhkBs3xh_bIBlPORNQChYpnKjauxC8Wcve263yB4kgj2HKKUwZw5THMCVEh01OiGzXGP93-X_pB1e4eTI</recordid><startdate>20200201</startdate><enddate>20200201</enddate><creator>Fu, Nianzu</creator><creator>Fu, Ziwei</creator><creator>Zhang, Huaiyuan</creator><creator>Liao, Qing</creator><creator>Zhao, Dong</creator><creator>Ke, Shaolin</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20200201</creationdate><title>Topological bound modes in optical waveguide arrays with alternating positive and negative couplings</title><author>Fu, Nianzu ; Fu, Ziwei ; Zhang, Huaiyuan ; Liao, Qing ; Zhao, Dong ; Ke, Shaolin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-b3dd4d33e2dc7cafcda469512065bd9b1c4ee70b14e2637eb12a71174b5d76533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Arrays</topic><topic>Brillouin zones</topic><topic>Characterization and Evaluation of Materials</topic><topic>Computer Communication Networks</topic><topic>Couplings</topic><topic>Electrical Engineering</topic><topic>Lasers</topic><topic>Optical Devices</topic><topic>Optical waveguides</topic><topic>Optics</topic><topic>Phase transitions</topic><topic>Photonics</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Refractivity</topic><topic>Topology</topic><topic>Tuning</topic><topic>Wave propagation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fu, Nianzu</creatorcontrib><creatorcontrib>Fu, Ziwei</creatorcontrib><creatorcontrib>Zhang, Huaiyuan</creatorcontrib><creatorcontrib>Liao, Qing</creatorcontrib><creatorcontrib>Zhao, Dong</creatorcontrib><creatorcontrib>Ke, Shaolin</creatorcontrib><collection>CrossRef</collection><jtitle>Optical and quantum electronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fu, Nianzu</au><au>Fu, Ziwei</au><au>Zhang, Huaiyuan</au><au>Liao, Qing</au><au>Zhao, Dong</au><au>Ke, Shaolin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Topological bound modes in optical waveguide arrays with alternating positive and negative couplings</atitle><jtitle>Optical and quantum electronics</jtitle><stitle>Opt Quant Electron</stitle><date>2020-02-01</date><risdate>2020</risdate><volume>52</volume><issue>2</issue><artnum>61</artnum><issn>0306-8919</issn><eissn>1572-817X</eissn><abstract>We investigate the topological bound modes in a binary waveguide array with alternating positive and negative couplings. The negative coupling is realized by incorporating additional waveguides into the bare array and suitably tuning the refractive index. We show the band structures close and Dirac point emerges at the Brillouin zone center when the absolute values of real and negative couplings are equal, indicating topological phase transition. The topological bound modes emerge at the edge of topological non-trivial arrays or at the interface of two arrays with different topologies. Moreover, we show the topological bound mode can be isolated from the trivial defect mode by tuning the coupling strength, which is reflected from wave propagation. The study provides a promising approach to realizing robust light transport.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s11082-019-2178-0</doi></addata></record> |
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| subjects | Arrays Brillouin zones Characterization and Evaluation of Materials Computer Communication Networks Couplings Electrical Engineering Lasers Optical Devices Optical waveguides Optics Phase transitions Photonics Physics Physics and Astronomy Refractivity Topology Tuning Wave propagation |
| title | Topological bound modes in optical waveguide arrays with alternating positive and negative couplings |
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