Tunable atom-trapping based on a plasmonic chiral metamaterial
Chiral metamaterials provide a very convenient way to actively regulate the light field via external means, which is very important in nanophotonics. However, the very weak chiral response of a generally planar metamaterial severely limits its application. Therefore, it is important to design a syst...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2019-07-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2019-0163 |
| _version_ | 1818580916226752512 |
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| author | Chen Zhao Chen Sai Wang Yangyang Xiao Lin |
| author_facet | Chen Zhao Chen Sai Wang Yangyang Xiao Lin |
| author_sort | Chen Zhao |
| collection | DOAJ |
| description | Chiral metamaterials provide a very convenient way to actively regulate the light field via external means, which is very important in nanophotonics. However, the very weak chiral response of a generally planar metamaterial severely limits its application. Therefore, it is important to design a system with large circular dichroism. Here we report an optical metamaterial with strong chirality in a bilayer gear-shaped plasmonic structure and consider this chiral response of such fields on tunable atom (87Rb) trapping. Simulation results show that maximum chiral response is observed when the two layers of the gear-shaped structures are rotated from each other by an angle of 60° at λ = 760 nm. Also, we demonstrate an active tunable potential for three-dimensional stable atom-trapping with tunable range of position and potential of a neutral atom of ~58 nm and ~1.3N mK (N denotes the input power with unit mW), respectively. In addition, the trap centers are about hundreds of nanometers away from the structure surface, which ensures the stability of the trapping system. The regulation of neutral atom trapping broadens the application of chiral metamaterials and has potential significance in the manipulation of cold atoms. |
| first_indexed | 2024-12-16T07:25:12Z |
| format | Article |
| id | doaj.art-b9bbdb76bef04a5793158831c5ee4b86 |
| institution | Directory Open Access Journal |
| issn | 2192-8606 2192-8614 |
| language | English |
| last_indexed | 2024-12-16T07:25:12Z |
| publishDate | 2019-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-b9bbdb76bef04a5793158831c5ee4b862022-12-21T22:39:32ZengDe GruyterNanophotonics2192-86062192-86142019-07-018101739174510.1515/nanoph-2019-0163nanoph-2019-0163Tunable atom-trapping based on a plasmonic chiral metamaterialChen Zhao0Chen Sai1Wang Yangyang2Xiao Lin3Nanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, ChinaNanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, ChinaNanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, ChinaNanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, ChinaChiral metamaterials provide a very convenient way to actively regulate the light field via external means, which is very important in nanophotonics. However, the very weak chiral response of a generally planar metamaterial severely limits its application. Therefore, it is important to design a system with large circular dichroism. Here we report an optical metamaterial with strong chirality in a bilayer gear-shaped plasmonic structure and consider this chiral response of such fields on tunable atom (87Rb) trapping. Simulation results show that maximum chiral response is observed when the two layers of the gear-shaped structures are rotated from each other by an angle of 60° at λ = 760 nm. Also, we demonstrate an active tunable potential for three-dimensional stable atom-trapping with tunable range of position and potential of a neutral atom of ~58 nm and ~1.3N mK (N denotes the input power with unit mW), respectively. In addition, the trap centers are about hundreds of nanometers away from the structure surface, which ensures the stability of the trapping system. The regulation of neutral atom trapping broadens the application of chiral metamaterials and has potential significance in the manipulation of cold atoms.https://doi.org/10.1515/nanoph-2019-0163surface plasmonsatom-trappingchiral metamaterials |
| spellingShingle | Chen Zhao Chen Sai Wang Yangyang Xiao Lin Tunable atom-trapping based on a plasmonic chiral metamaterial Nanophotonics surface plasmons atom-trapping chiral metamaterials |
| title | Tunable atom-trapping based on a plasmonic chiral metamaterial |
| title_full | Tunable atom-trapping based on a plasmonic chiral metamaterial |
| title_fullStr | Tunable atom-trapping based on a plasmonic chiral metamaterial |
| title_full_unstemmed | Tunable atom-trapping based on a plasmonic chiral metamaterial |
| title_short | Tunable atom-trapping based on a plasmonic chiral metamaterial |
| title_sort | tunable atom trapping based on a plasmonic chiral metamaterial |
| topic | surface plasmons atom-trapping chiral metamaterials |
| url | https://doi.org/10.1515/nanoph-2019-0163 |
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