Topological charge of soft X-ray vortex beam determined by inline holography
Abstract A Laguerre–Gaussian (LG) vortex beam having a spiral wavefront can be characterized by its topological charge (TC). The TC gives the number of times that the beam phase passes through the interval $$[0, 2\pi ]$$ [ 0 , 2 π ] following a closed loop surrounding the propagation axis. Here, the...
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| Format: | Article |
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Nature Portfolio
2022-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-04933-5 |
| _version_ | 1819261118560862208 |
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| author | Yuta Ishii Hironori Nakao Masaichiro Mizumaki Yusuke Wakabayashi Taka-hisa Arima Yuichi Yamasaki |
| author_facet | Yuta Ishii Hironori Nakao Masaichiro Mizumaki Yusuke Wakabayashi Taka-hisa Arima Yuichi Yamasaki |
| author_sort | Yuta Ishii |
| collection | DOAJ |
| description | Abstract A Laguerre–Gaussian (LG) vortex beam having a spiral wavefront can be characterized by its topological charge (TC). The TC gives the number of times that the beam phase passes through the interval $$[0, 2\pi ]$$ [ 0 , 2 π ] following a closed loop surrounding the propagation axis. Here, the TC spectra of soft X-ray vortex beams are acquired using the in-line holography technique, where interference between vortex waves produced from a fork grating and divergent waves from a Fresnel zone plate is observed as a holographic image. The analyses revealed the phase distributions and the TC for the LG vortex waves, which reflects topological number of the fork gratings, as well as for the Hermite–Gaussian (HG) mode waves generated from the other gratings. We also conducted a simulation of the present technique for pair annihilation of topological defects in a magnetic texture. These results may pave the way for development of probes capable of characterizing the topological numbers of magnetic defects. |
| first_indexed | 2024-12-23T19:36:43Z |
| format | Article |
| id | doaj.art-6f3077306b784eaca3da7f169cf5d4a6 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-23T19:36:43Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-6f3077306b784eaca3da7f169cf5d4a62022-12-21T17:33:46ZengNature PortfolioScientific Reports2045-23222022-01-011211810.1038/s41598-022-04933-5Topological charge of soft X-ray vortex beam determined by inline holographyYuta Ishii0Hironori Nakao1Masaichiro Mizumaki2Yusuke Wakabayashi3Taka-hisa Arima4Yuichi Yamasaki5Department of Physics, Tohoku UniversityPhoton Factory, Institute of Materials Structure Science, High Energy Accelerator Research OrganizationJapan Synchrotron Radiation Research Institute (JASRI/SPring-8)Department of Physics, Tohoku UniversityRIKEN Center for Emergent Matter Science (CEMS)Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research OrganizationAbstract A Laguerre–Gaussian (LG) vortex beam having a spiral wavefront can be characterized by its topological charge (TC). The TC gives the number of times that the beam phase passes through the interval $$[0, 2\pi ]$$ [ 0 , 2 π ] following a closed loop surrounding the propagation axis. Here, the TC spectra of soft X-ray vortex beams are acquired using the in-line holography technique, where interference between vortex waves produced from a fork grating and divergent waves from a Fresnel zone plate is observed as a holographic image. The analyses revealed the phase distributions and the TC for the LG vortex waves, which reflects topological number of the fork gratings, as well as for the Hermite–Gaussian (HG) mode waves generated from the other gratings. We also conducted a simulation of the present technique for pair annihilation of topological defects in a magnetic texture. These results may pave the way for development of probes capable of characterizing the topological numbers of magnetic defects.https://doi.org/10.1038/s41598-022-04933-5 |
| spellingShingle | Yuta Ishii Hironori Nakao Masaichiro Mizumaki Yusuke Wakabayashi Taka-hisa Arima Yuichi Yamasaki Topological charge of soft X-ray vortex beam determined by inline holography Scientific Reports |
| title | Topological charge of soft X-ray vortex beam determined by inline holography |
| title_full | Topological charge of soft X-ray vortex beam determined by inline holography |
| title_fullStr | Topological charge of soft X-ray vortex beam determined by inline holography |
| title_full_unstemmed | Topological charge of soft X-ray vortex beam determined by inline holography |
| title_short | Topological charge of soft X-ray vortex beam determined by inline holography |
| title_sort | topological charge of soft x ray vortex beam determined by inline holography |
| url | https://doi.org/10.1038/s41598-022-04933-5 |
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