Valley surface-wave photonic crystal and its bulk/edge transport
Recent theories have proposed a concept of valley photonic crystals as an analog of gapped valleytronic materials such as MoS2 and bilayer graphene. Here, we further extend the applicability of valley photonic crystals to surface electromagnetic waves and experimentally demonstrate a valley surface-...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/85781 http://hdl.handle.net/10220/45308 |
| _version_ | 1811692098117697536 |
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| author | Gao, Zhen Yang, Zhaoju Gao, Fei Xue, Haoran Yang, Yahui Dong, Jianwen Zhang, Baile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Gao, Zhen Yang, Zhaoju Gao, Fei Xue, Haoran Yang, Yahui Dong, Jianwen Zhang, Baile |
| author_sort | Gao, Zhen |
| collection | NTU |
| description | Recent theories have proposed a concept of valley photonic crystals as an analog of gapped valleytronic materials such as MoS2 and bilayer graphene. Here, we further extend the applicability of valley photonic crystals to surface electromagnetic waves and experimentally demonstrate a valley surface-wave photonic crystal on a single metal surface as a photonic duplicate of MoS2. Both bulk transport and edge transport are directly mapped with a near-field microwave imaging system. The photonic valley pseudospins are demonstrated, together with the photonic valley Hall effect that splits the opposite photonic valley pseudospins into two opposite directions. The valley edge transport in MoS2 or other transition-metal dichalcogenide monolayers, which is different from bilayer graphene but still stays unrealized in condensed-matter systems, is demonstrated on this MoS2-like photonic platform. Our study not only offers a tabletop platform to study the valleytronic physics, but also opens a venue for on-chip integrated photonic device applications using valley-polarized information. |
| first_indexed | 2024-10-01T06:30:23Z |
| format | Journal Article |
| id | ntu-10356/85781 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:30:23Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/857812023-02-28T19:33:39Z Valley surface-wave photonic crystal and its bulk/edge transport Gao, Zhen Yang, Zhaoju Gao, Fei Xue, Haoran Yang, Yahui Dong, Jianwen Zhang, Baile School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Surface Plasmons Photonic Crystals Recent theories have proposed a concept of valley photonic crystals as an analog of gapped valleytronic materials such as MoS2 and bilayer graphene. Here, we further extend the applicability of valley photonic crystals to surface electromagnetic waves and experimentally demonstrate a valley surface-wave photonic crystal on a single metal surface as a photonic duplicate of MoS2. Both bulk transport and edge transport are directly mapped with a near-field microwave imaging system. The photonic valley pseudospins are demonstrated, together with the photonic valley Hall effect that splits the opposite photonic valley pseudospins into two opposite directions. The valley edge transport in MoS2 or other transition-metal dichalcogenide monolayers, which is different from bilayer graphene but still stays unrealized in condensed-matter systems, is demonstrated on this MoS2-like photonic platform. Our study not only offers a tabletop platform to study the valleytronic physics, but also opens a venue for on-chip integrated photonic device applications using valley-polarized information. MOE (Min. of Education, S’pore) Published version 2018-07-27T04:52:33Z 2019-12-06T16:10:05Z 2018-07-27T04:52:33Z 2019-12-06T16:10:05Z 2017 Journal Article Gao, Z., Yang, Z., Gao, F., Xue, H., Yang, Y., Dong, J., et al. (2017). Valley surface-wave photonic crystal and its bulk/edge transport. Physical Review B, 96(20), 201402-. 2469-9950 https://hdl.handle.net/10356/85781 http://hdl.handle.net/10220/45308 10.1103/PhysRevB.96.201402 en Physical Review B © 2017 American Physical Society (APS). This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.96.201402]. 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. 6 p. application/pdf |
| spellingShingle | Surface Plasmons Photonic Crystals Gao, Zhen Yang, Zhaoju Gao, Fei Xue, Haoran Yang, Yahui Dong, Jianwen Zhang, Baile Valley surface-wave photonic crystal and its bulk/edge transport |
| title | Valley surface-wave photonic crystal and its bulk/edge transport |
| title_full | Valley surface-wave photonic crystal and its bulk/edge transport |
| title_fullStr | Valley surface-wave photonic crystal and its bulk/edge transport |
| title_full_unstemmed | Valley surface-wave photonic crystal and its bulk/edge transport |
| title_short | Valley surface-wave photonic crystal and its bulk/edge transport |
| title_sort | valley surface wave photonic crystal and its bulk edge transport |
| topic | Surface Plasmons Photonic Crystals |
| url | https://hdl.handle.net/10356/85781 http://hdl.handle.net/10220/45308 |
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