Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings
Moving electrons interacting with media can give rise to electromagnetic radiations and has been emerged as a promising platform for particle detection, spectroscopies, and free-electron lasers. In this letter, we investigate the Smith-Purcell radiation from helical metagratings, chiral structures s...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2019-01-01
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| Series: | Research |
| Online Access: | http://dx.doi.org/10.34133/2019/3806132 |
| _version_ | 1797283274000695296 |
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| author | Liqiao Jing Zuojia Wang Xiao Lin Bin Zheng Su Xu Lian Shen Yihao Yang Fei Gao Min Chen Hongsheng Chen |
| author_facet | Liqiao Jing Zuojia Wang Xiao Lin Bin Zheng Su Xu Lian Shen Yihao Yang Fei Gao Min Chen Hongsheng Chen |
| author_sort | Liqiao Jing |
| collection | DOAJ |
| description | Moving electrons interacting with media can give rise to electromagnetic radiations and has been emerged as a promising platform for particle detection, spectroscopies, and free-electron lasers. In this letter, we investigate the Smith-Purcell radiation from helical metagratings, chiral structures similar to deoxyribonucleic acid (DNA), in order to understand the interplay between electrons, photons, and object chirality. Spiral field patterns can be generated while introducing a gradient azimuthal phase distribution to the induced electric dipole array at the cylindrical interface. Experimental measurements show efficient control over angular momentum of the radiated field at microwave regime, utilizing a phased electromagnetic dipole array to mimic moving charged particles. The angular momentum of the radiated wave is determined solely by the handedness of the helical structure, and it thus serves as a potential candidate for the detection of chiral objects. Our findings not only pave a way for design of orbital angular momentum free-electron lasers but also provide a platform to study the interplay between swift electrons with chiral objects. |
| first_indexed | 2024-03-07T17:28:41Z |
| format | Article |
| id | doaj.art-fbd135f6c9954159b3da2ab6f14a0e50 |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-03-07T17:28:41Z |
| publishDate | 2019-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-fbd135f6c9954159b3da2ab6f14a0e502024-03-02T18:34:42ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742019-01-01201910.34133/2019/3806132Spiral Field Generation in Smith-Purcell Radiation by Helical MetagratingsLiqiao Jing0Zuojia Wang1Xiao Lin2Bin Zheng3Su Xu4Lian Shen5Yihao Yang6Fei Gao7Min Chen8Hongsheng Chen9Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USASchool of Information Science and Engineering, Shandong University, Qingdao 266237, ChinaDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, SingaporeKey Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, ChinaKey Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, ChinaDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, SingaporeKey Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, ChinaDepartment of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USAKey Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, ChinaMoving electrons interacting with media can give rise to electromagnetic radiations and has been emerged as a promising platform for particle detection, spectroscopies, and free-electron lasers. In this letter, we investigate the Smith-Purcell radiation from helical metagratings, chiral structures similar to deoxyribonucleic acid (DNA), in order to understand the interplay between electrons, photons, and object chirality. Spiral field patterns can be generated while introducing a gradient azimuthal phase distribution to the induced electric dipole array at the cylindrical interface. Experimental measurements show efficient control over angular momentum of the radiated field at microwave regime, utilizing a phased electromagnetic dipole array to mimic moving charged particles. The angular momentum of the radiated wave is determined solely by the handedness of the helical structure, and it thus serves as a potential candidate for the detection of chiral objects. Our findings not only pave a way for design of orbital angular momentum free-electron lasers but also provide a platform to study the interplay between swift electrons with chiral objects.http://dx.doi.org/10.34133/2019/3806132 |
| spellingShingle | Liqiao Jing Zuojia Wang Xiao Lin Bin Zheng Su Xu Lian Shen Yihao Yang Fei Gao Min Chen Hongsheng Chen Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings Research |
| title | Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings |
| title_full | Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings |
| title_fullStr | Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings |
| title_full_unstemmed | Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings |
| title_short | Spiral Field Generation in Smith-Purcell Radiation by Helical Metagratings |
| title_sort | spiral field generation in smith purcell radiation by helical metagratings |
| url | http://dx.doi.org/10.34133/2019/3806132 |
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