Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator
We present an analysis of the enhanced spin Hall effect of light (SHEL) resulting from a reflected Airy beam off the interface of an air-topological insulator (TI). Our study suggests that the surface conductivity of TI film and the decay factors of Airy beams are crucial in increasing the spin-spli...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379724003036 |
| _version_ | 1797213385045049344 |
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| author | Di Yu Haoyuan Song Yubo Li Yuqi Zhang Qiang Zhang Shufang Fu Xuanzhang Wang |
| author_facet | Di Yu Haoyuan Song Yubo Li Yuqi Zhang Qiang Zhang Shufang Fu Xuanzhang Wang |
| author_sort | Di Yu |
| collection | DOAJ |
| description | We present an analysis of the enhanced spin Hall effect of light (SHEL) resulting from a reflected Airy beam off the interface of an air-topological insulator (TI). Our study suggests that the surface conductivity of TI film and the decay factors of Airy beams are crucial in increasing the spin-splitting distance and the spatial shifts of the left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) components. An apparent spatial shift asymmetry depending on the decay factors can be observed between the LCP and RCP components, where the coupling of intrinsic and extrinsic angular momentum will play a significant impact. The connection among the thickness of TI film, chemical potential and the incident frequency at the fixed decay factors is thoroughly examined to achieve the maximum of spatial shifts. We find that the coupling between the upper and lower surfaces’ conductivity could be responsible for the pronounced SHEL. These conclusions can be extended to other interfaces of comparable structures, such as insulators coated with a layer of two-dimensional Dirac material. Our work provides novel insights into the use of innovative beams incident on the surface of TI film and their potential applications in optical detection. |
| first_indexed | 2024-04-24T10:57:26Z |
| format | Article |
| id | doaj.art-6e2972afb8b4447e800317c926b6cee5 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-24T10:57:26Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-6e2972afb8b4447e800317c926b6cee52024-04-12T04:45:19ZengElsevierResults in Physics2211-37972024-04-0159107620Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulatorDi Yu0Haoyuan Song1Yubo Li2Yuqi Zhang3Qiang Zhang4Shufang Fu5Xuanzhang Wang6Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaCollege of Physical Science and Technology, Heilongjiang University, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China; Corresponding author.Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaWe present an analysis of the enhanced spin Hall effect of light (SHEL) resulting from a reflected Airy beam off the interface of an air-topological insulator (TI). Our study suggests that the surface conductivity of TI film and the decay factors of Airy beams are crucial in increasing the spin-splitting distance and the spatial shifts of the left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) components. An apparent spatial shift asymmetry depending on the decay factors can be observed between the LCP and RCP components, where the coupling of intrinsic and extrinsic angular momentum will play a significant impact. The connection among the thickness of TI film, chemical potential and the incident frequency at the fixed decay factors is thoroughly examined to achieve the maximum of spatial shifts. We find that the coupling between the upper and lower surfaces’ conductivity could be responsible for the pronounced SHEL. These conclusions can be extended to other interfaces of comparable structures, such as insulators coated with a layer of two-dimensional Dirac material. Our work provides novel insights into the use of innovative beams incident on the surface of TI film and their potential applications in optical detection.http://www.sciencedirect.com/science/article/pii/S2211379724003036Spin Hall effect of lightAiry beamTopological insulator |
| spellingShingle | Di Yu Haoyuan Song Yubo Li Yuqi Zhang Qiang Zhang Shufang Fu Xuanzhang Wang Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator Results in Physics Spin Hall effect of light Airy beam Topological insulator |
| title | Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator |
| title_full | Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator |
| title_fullStr | Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator |
| title_full_unstemmed | Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator |
| title_short | Spin-splitting and spin Hall effect of reflected Airy beams on the surface of topological insulator |
| title_sort | spin splitting and spin hall effect of reflected airy beams on the surface of topological insulator |
| topic | Spin Hall effect of light Airy beam Topological insulator |
| url | http://www.sciencedirect.com/science/article/pii/S2211379724003036 |
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