Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles
The development of all-dielectric structures with high magnetic response at optical frequencies has become a matter of intense study in past years. However, magnetic effects are weak at optical frequencies due to the small value of the magnetic permeability of natural materials. To this end, natural...
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/19/3428 |
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| author | Oleg V. Minin Song Zhou Cheng-Yang Liu Jelene Antonicole Ngan Kong Igor V. Minin |
| author_facet | Oleg V. Minin Song Zhou Cheng-Yang Liu Jelene Antonicole Ngan Kong Igor V. Minin |
| author_sort | Oleg V. Minin |
| collection | DOAJ |
| description | The development of all-dielectric structures with high magnetic response at optical frequencies has become a matter of intense study in past years. However, magnetic effects are weak at optical frequencies due to the small value of the magnetic permeability of natural materials. To this end, natural dielectric materials are unemployable for practical “magnetic” applications in optics. We have shown for the first time that it is possible to induce intense magnetic concentric subwavelength “hot circles” in a dielectric mesoscale Janus particle. The basis of the Janus particle is a combination of the effects of a photonic jet, whispering-gallery waves, and the concept of solid immersion. Simulations show an (H/H<sub>0</sub>)<sup>2</sup>/(E/E<sub>0</sub>)<sup>2</sup> contrast of more than 10, and maximal magnetic field intensity enhancement is more than 1000 for a wavelength-scaled particle with a refractive index <i>n</i> < 2 and a size parameter in the order of 30. This work may provide a new way to realize precise magnetic devices for integrated photonic circuits and light–matter interaction. |
| first_indexed | 2024-03-09T21:21:54Z |
| format | Article |
| id | doaj.art-97155d39ff7346e8aca976a45a8d8c3d |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T21:21:54Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-97155d39ff7346e8aca976a45a8d8c3d2023-11-23T21:19:54ZengMDPI AGNanomaterials2079-49912022-09-011219342810.3390/nano12193428Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus ParticlesOleg V. Minin0Song Zhou1Cheng-Yang Liu2Jelene Antonicole Ngan Kong3Igor V. Minin4Nondestructive Testing School, Tomsk Polytechnic University, 30 Lenin Ave., Tomsk 634050, RussiaJiangsu Key Laboratory of Advanced Manufacturing Technology, Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huai’an 223003, ChinaDepartment of Biomedical Engineering, National Yang Ming Chiao Tung University, Taipei City 11221, TaiwanDepartment of Biomedical Engineering, National Yang Ming Chiao Tung University, Taipei City 11221, TaiwanNondestructive Testing School, Tomsk Polytechnic University, 30 Lenin Ave., Tomsk 634050, RussiaThe development of all-dielectric structures with high magnetic response at optical frequencies has become a matter of intense study in past years. However, magnetic effects are weak at optical frequencies due to the small value of the magnetic permeability of natural materials. To this end, natural dielectric materials are unemployable for practical “magnetic” applications in optics. We have shown for the first time that it is possible to induce intense magnetic concentric subwavelength “hot circles” in a dielectric mesoscale Janus particle. The basis of the Janus particle is a combination of the effects of a photonic jet, whispering-gallery waves, and the concept of solid immersion. Simulations show an (H/H<sub>0</sub>)<sup>2</sup>/(E/E<sub>0</sub>)<sup>2</sup> contrast of more than 10, and maximal magnetic field intensity enhancement is more than 1000 for a wavelength-scaled particle with a refractive index <i>n</i> < 2 and a size parameter in the order of 30. This work may provide a new way to realize precise magnetic devices for integrated photonic circuits and light–matter interaction.https://www.mdpi.com/2079-4991/12/19/3428Janus particlehot-spot generationmagnetic fieldmagnetic hot circlesmesotronics |
| spellingShingle | Oleg V. Minin Song Zhou Cheng-Yang Liu Jelene Antonicole Ngan Kong Igor V. Minin Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles Nanomaterials Janus particle hot-spot generation magnetic field magnetic hot circles mesotronics |
| title | Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles |
| title_full | Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles |
| title_fullStr | Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles |
| title_full_unstemmed | Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles |
| title_short | Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles |
| title_sort | magnetic concentric hot circle generation at optical frequencies in all dielectric mesoscale janus particles |
| topic | Janus particle hot-spot generation magnetic field magnetic hot circles mesotronics |
| url | https://www.mdpi.com/2079-4991/12/19/3428 |
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