Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light
Vector beams (VBs) and their superposition have found important applications in versatile fields such as optical communications, super-resolution microscopy and quantum information, and metasurfaces have enabled the miniaturization and integration of the optical systems manipulating the vector beams...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/10/3/317 |
| _version_ | 1827748031630409728 |
|---|---|
| author | Lianmeng Li Xiangyu Zeng Manna Gu Yuqin Zhang Rui Sun Ziheng Zhang Guosen Cui Yuxiang Zhou Chuanfu Cheng Chunxiang Liu |
| author_facet | Lianmeng Li Xiangyu Zeng Manna Gu Yuqin Zhang Rui Sun Ziheng Zhang Guosen Cui Yuxiang Zhou Chuanfu Cheng Chunxiang Liu |
| author_sort | Lianmeng Li |
| collection | DOAJ |
| description | Vector beams (VBs) and their superposition have found important applications in versatile fields such as optical communications, super-resolution microscopy and quantum information, and metasurfaces have enabled the miniaturization and integration of the optical systems manipulating the vector beams, providing potential applications to subwavelength regimes. In this work, we propose a metasurface to realize the superposition of profile-tunable tightly focused VBs, with the novel structured light fields generated. The metasurface is composed of two sets of orthogonal-nanoslit pairs arranged on the inner and outer rings. By realizing the chiral conversion of circularly polarized light with the slit-pairs which act as half-wave plates, and by creating helical phase profiles of optical vortices with the geometrical phase of rotational nano-slit pairs, two focused Bessel VBs are formed. By finely varying the diameters of two sets of rings, the doughnuts of the two Bessel VBs of different orders are tuned to be of the same size, and the superposition of the two VBs is realized. The theoretical analyses of the superimposed fields were presented, the FDTD simulations were performed to optimize the designed metasurfaces, and the experimental measurements were carried out to validate feasibility of the metasurface. The novel and interesting characteristics of the superposed fields different from those of the conventional VBs were demonstrated. This work will be of significance for classical and quantum applications of VBs in various fields. |
| first_indexed | 2024-03-11T06:01:35Z |
| format | Article |
| id | doaj.art-c4eea71cc7c545a7b4f23f96c0d87bd2 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-11T06:01:35Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-c4eea71cc7c545a7b4f23f96c0d87bd22023-11-17T13:19:20ZengMDPI AGPhotonics2304-67322023-03-0110331710.3390/photonics10030317Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured LightLianmeng Li0Xiangyu Zeng1Manna Gu2Yuqin Zhang3Rui Sun4Ziheng Zhang5Guosen Cui6Yuxiang Zhou7Chuanfu Cheng8Chunxiang Liu9College of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaCollege of Physics and Electronics, Shandong Normal University, Jinan 250014, ChinaVector beams (VBs) and their superposition have found important applications in versatile fields such as optical communications, super-resolution microscopy and quantum information, and metasurfaces have enabled the miniaturization and integration of the optical systems manipulating the vector beams, providing potential applications to subwavelength regimes. In this work, we propose a metasurface to realize the superposition of profile-tunable tightly focused VBs, with the novel structured light fields generated. The metasurface is composed of two sets of orthogonal-nanoslit pairs arranged on the inner and outer rings. By realizing the chiral conversion of circularly polarized light with the slit-pairs which act as half-wave plates, and by creating helical phase profiles of optical vortices with the geometrical phase of rotational nano-slit pairs, two focused Bessel VBs are formed. By finely varying the diameters of two sets of rings, the doughnuts of the two Bessel VBs of different orders are tuned to be of the same size, and the superposition of the two VBs is realized. The theoretical analyses of the superimposed fields were presented, the FDTD simulations were performed to optimize the designed metasurfaces, and the experimental measurements were carried out to validate feasibility of the metasurface. The novel and interesting characteristics of the superposed fields different from those of the conventional VBs were demonstrated. This work will be of significance for classical and quantum applications of VBs in various fields.https://www.mdpi.com/2304-6732/10/3/317metasurfacevector beamsgeometrical phaseorthogonal-nanoslit pairs |
| spellingShingle | Lianmeng Li Xiangyu Zeng Manna Gu Yuqin Zhang Rui Sun Ziheng Zhang Guosen Cui Yuxiang Zhou Chuanfu Cheng Chunxiang Liu Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light Photonics metasurface vector beams geometrical phase orthogonal-nanoslit pairs |
| title | Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light |
| title_full | Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light |
| title_fullStr | Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light |
| title_full_unstemmed | Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light |
| title_short | Plasmonic Metasurfaces for Superposition of Profile-Tunable Tightly Focused Vector Beams and Generation of the Structured Light |
| title_sort | plasmonic metasurfaces for superposition of profile tunable tightly focused vector beams and generation of the structured light |
| topic | metasurface vector beams geometrical phase orthogonal-nanoslit pairs |
| url | https://www.mdpi.com/2304-6732/10/3/317 |
| work_keys_str_mv | AT lianmengli plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT xiangyuzeng plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT mannagu plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT yuqinzhang plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT ruisun plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT zihengzhang plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT guosencui plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT yuxiangzhou plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT chuanfucheng plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight AT chunxiangliu plasmonicmetasurfacesforsuperpositionofprofiletunabletightlyfocusedvectorbeamsandgenerationofthestructuredlight |