Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement
High refractive index dielectric nanostructures represent a new frontier in nanophotonics, and the unique semiconductor characteristics of dielectric systems make it possible to enhance electric fields by exploiting this fundamental physical phenomenon. In this work, the scattered radiation spectral...
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute
2021
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| Online Access: | https://hdl.handle.net/1721.1/136671.2 |
| _version_ | 1811097426279268352 |
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| author | Sun, Tao |
| author2 | Massachusetts Institute of Technology. Media Laboratory |
| author_facet | Massachusetts Institute of Technology. Media Laboratory Sun, Tao |
| author_sort | Sun, Tao |
| collection | MIT |
| description | High refractive index dielectric nanostructures represent a new frontier in nanophotonics, and the unique semiconductor characteristics of dielectric systems make it possible to enhance electric fields by exploiting this fundamental physical phenomenon. In this work, the scattered radiation spectral features and field-enhanced interactions of gallium phosphide disks with forked slits at anapole modes are investigated systematically by numerical and multipole decomposition analyses. Additional enhancement of the electric field is achieved by opening the forked slits to create high-intensity hot spots inside the disk, and nearby molecules can access these hot spots directly. The results reveal a novel approach for near-field engineering such as electric field localization, nonlinear optics, and optical detection. |
| first_indexed | 2024-09-23T16:59:21Z |
| format | Article |
| id | mit-1721.1/136671.2 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:59:21Z |
| publishDate | 2021 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/136671.22021-12-08T17:27:55Z Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement Sun, Tao Massachusetts Institute of Technology. Media Laboratory High refractive index dielectric nanostructures represent a new frontier in nanophotonics, and the unique semiconductor characteristics of dielectric systems make it possible to enhance electric fields by exploiting this fundamental physical phenomenon. In this work, the scattered radiation spectral features and field-enhanced interactions of gallium phosphide disks with forked slits at anapole modes are investigated systematically by numerical and multipole decomposition analyses. Additional enhancement of the electric field is achieved by opening the forked slits to create high-intensity hot spots inside the disk, and nearby molecules can access these hot spots directly. The results reveal a novel approach for near-field engineering such as electric field localization, nonlinear optics, and optical detection. China Postdoctoral Science Foundation (Grant No. 2020M670881) Northeast Petroleum University. Outstanding Young and Middle-aged Scientific Research Innovation Team Project (2019KQ74) Central Authorities. Local Universities Reformation and Development (140119001) City University of Hong Kong. Strategic Research Grant (SRG 7005505) Sichuan Sheng (China). Science and Technology Department. Scientific Research Fund 2021-12-08T17:27:54Z 2021-10-28T12:03:16Z 2021-12-08T17:27:54Z 2021-06-04 2021-06-10T13:46:26Z Article http://purl.org/eprint/type/JournalArticle 2079-4991 https://hdl.handle.net/1721.1/136671.2 Nanomaterials 11 (6): 1490 (2021) PUBLISHER_CC http://dx.doi.org/10.3390/nano11061490 Nanomaterials Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/octet-stream Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Sun, Tao Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title | Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title_full | Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title_fullStr | Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title_full_unstemmed | Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title_short | Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement |
| title_sort | optical anapole modes in gallium phosphide nanodisk with forked slits for electric field enhancement |
| url | https://hdl.handle.net/1721.1/136671.2 |
| work_keys_str_mv | AT suntao opticalanapolemodesingalliumphosphidenanodiskwithforkedslitsforelectricfieldenhancement |