Spin-resolved near-field scanning optical microscopy for mapping of the spin angular momentum distribution of focused beams
We proposed and built a near-field scanning optical microscope (NSOM) to enable the characterization of the spin angular momentum (SAM) distribution of electromagnetic fields with nanoscale resolution. The NSOM probe was composed of a circular nanohole formed in a thick gold film that was deposited...
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| Veröffentlicht in: | Applied physics letters 2020-06, Vol.116 (24) |
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| creator | Yin, Xiaojin Shi, Peng Du, Luping Yuan, Xiaocong |
| description | We proposed and built a near-field scanning optical microscope (NSOM) to enable the characterization of the spin angular momentum (SAM) distribution of electromagnetic fields with nanoscale resolution. The NSOM probe was composed of a circular nanohole formed in a thick gold film that was deposited on a tapered cone fiber. The near-field signal, when coupled through the nanohole to the fiber, was split and analyzed using a combination of a quarter-wave plate and a polarizer to extract the two circular polarization components of the signal. This allowed us to characterize the out-of-plane SAM component, which was determined using the relationship Sz ∝ IRCP − ILCP. Using the developed system, we mapped the SAM distributions of a variety of tightly focused cylindrical vector vortex beams and thus validated the system's effectiveness. The proposed spin-resolved NSOM could be a valuable tool for studies of both near-field spin optics and topological photonics. |
| doi_str_mv | 10.1063/5.0004750 |
| format | Article |
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The NSOM probe was composed of a circular nanohole formed in a thick gold film that was deposited on a tapered cone fiber. The near-field signal, when coupled through the nanohole to the fiber, was split and analyzed using a combination of a quarter-wave plate and a polarizer to extract the two circular polarization components of the signal. This allowed us to characterize the out-of-plane SAM component, which was determined using the relationship Sz ∝ IRCP − ILCP. Using the developed system, we mapped the SAM distributions of a variety of tightly focused cylindrical vector vortex beams and thus validated the system's effectiveness. The proposed spin-resolved NSOM could be a valuable tool for studies of both near-field spin optics and topological photonics.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/5.0004750</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Angular momentum ; Applied physics ; Circular polarization ; Electromagnetic fields ; Electron beams ; Ion beams ; Mapping ; Microscopes ; Near field optical microscopes ; Optical microscopes ; Optical microscopy ; Polarizers ; Wave plates</subject><ispartof>Applied physics letters, 2020-06, Vol.116 (24)</ispartof><rights>Author(s)</rights><rights>2020 Author(s). 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The proposed spin-resolved NSOM could be a valuable tool for studies of both near-field spin optics and topological photonics.</description><subject>Angular momentum</subject><subject>Applied physics</subject><subject>Circular polarization</subject><subject>Electromagnetic fields</subject><subject>Electron beams</subject><subject>Ion beams</subject><subject>Mapping</subject><subject>Microscopes</subject><subject>Near field optical microscopes</subject><subject>Optical microscopes</subject><subject>Optical microscopy</subject><subject>Polarizers</subject><subject>Wave plates</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqdkE9LxDAQxYMouK4e_AYBTwpdJ02btkdZ_AcLHtRzSdNkzdImMUkXFr-8WVfw7ml4837MYx5ClwQWBBi9LRcAUFQlHKEZgarKKCH1MZqlLc1YU5JTdBbCJskyp3SGvl6dNpmXwQ5b2WMjuc-UlkOPg-DGaLPG1kUt-IBHLbwNwrodVtbjkTv3YyscPyQOSWBu1tPAk2dHaeI04l6H6HU3RW3NnlRWTCHldJKP4RydKD4EefE75-j94f5t-ZStXh6fl3erTNC8ihlvOtrVgvUUGAfKFCXQAK26oi-4ApVz2RWKlVUulaJ1zRjUFTABfSlU3gs6R1eHu87bz0mG2G7s5E2KbPOCFHXTNNAk6vpA7b8MXqrWeT1yv2sJtPtu27L97TaxNwc2CB35_rn_wVvr_8DW9Yp-A8Xvick</recordid><startdate>20200615</startdate><enddate>20200615</enddate><creator>Yin, Xiaojin</creator><creator>Shi, Peng</creator><creator>Du, Luping</creator><creator>Yuan, Xiaocong</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-8293-7133</orcidid><orcidid>https://orcid.org/0000-0001-9583-9412</orcidid><orcidid>https://orcid.org/0000-0002-6565-4334</orcidid><orcidid>https://orcid.org/0000-0003-2605-9003</orcidid></search><sort><creationdate>20200615</creationdate><title>Spin-resolved near-field scanning optical microscopy for mapping of the spin angular momentum distribution of focused beams</title><author>Yin, Xiaojin ; Shi, Peng ; Du, Luping ; Yuan, Xiaocong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-a9b3b8c6d306a036f3109037b4d4af0f2aeb4f6572eff3886608706c0d5cf2dc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Angular momentum</topic><topic>Applied physics</topic><topic>Circular polarization</topic><topic>Electromagnetic fields</topic><topic>Electron beams</topic><topic>Ion beams</topic><topic>Mapping</topic><topic>Microscopes</topic><topic>Near field optical microscopes</topic><topic>Optical microscopes</topic><topic>Optical microscopy</topic><topic>Polarizers</topic><topic>Wave plates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yin, Xiaojin</creatorcontrib><creatorcontrib>Shi, Peng</creatorcontrib><creatorcontrib>Du, Luping</creatorcontrib><creatorcontrib>Yuan, Xiaocong</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yin, Xiaojin</au><au>Shi, Peng</au><au>Du, Luping</au><au>Yuan, Xiaocong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spin-resolved near-field scanning optical microscopy for mapping of the spin angular momentum distribution of focused beams</atitle><jtitle>Applied physics letters</jtitle><date>2020-06-15</date><risdate>2020</risdate><volume>116</volume><issue>24</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>We proposed and built a near-field scanning optical microscope (NSOM) to enable the characterization of the spin angular momentum (SAM) distribution of electromagnetic fields with nanoscale resolution. The NSOM probe was composed of a circular nanohole formed in a thick gold film that was deposited on a tapered cone fiber. The near-field signal, when coupled through the nanohole to the fiber, was split and analyzed using a combination of a quarter-wave plate and a polarizer to extract the two circular polarization components of the signal. This allowed us to characterize the out-of-plane SAM component, which was determined using the relationship Sz ∝ IRCP − ILCP. Using the developed system, we mapped the SAM distributions of a variety of tightly focused cylindrical vector vortex beams and thus validated the system's effectiveness. 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| issn | 0003-6951 1077-3118 |
| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Angular momentum Applied physics Circular polarization Electromagnetic fields Electron beams Ion beams Mapping Microscopes Near field optical microscopes Optical microscopes Optical microscopy Polarizers Wave plates |
| title | Spin-resolved near-field scanning optical microscopy for mapping of the spin angular momentum distribution of focused beams |
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