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http://hdl.handle.net/1942/36665
Title: | Analysis of Anapole States in Dielectric Spheres and Application to Near-Field Enhancement | Authors: | Dey, Utpal AGASTI, Souvik Li , Yizhang Hesselbarth, Jan |
Issue Date: | 2022 | Publisher: | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Source: | IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 70 (2) , p. 1144 -1156 | Abstract: | Anapole states in isolated, homogeneous, and isotropic dielectric spheres are studied theoretically in accordance with Mie theory, numerically by full-wave electromagnetic simulations and by measurements at microwave and millimeter-wave frequency. Depending on the size and material properties of the dielectric spheres, the practical limitations of detection and possible applications of nonradiating anapole states are investigated. The electromagnetic signature, generated by anapole states of a spherical dielectric scatterer, in terms of finite extinction cross section, is verified by measurements, for both its electric and magnetic versions, in silicon and alumina spheres, respectively. In addition, the existence and the detection of higher order and hybrid anapole states are demonstrated. Finally, an approach to engineer electric field hotspots in a subwavelength-sized gap between two magnetic anapole coupled alumina ceramic spheres is demonstrated. | Notes: | Dey, U (corresponding author), Univ Stuttgart, Inst Radio Frequency Technol IHF, D-70569 Stuttgart, Germany. utpal.dey@ihf.uni-stuttgart.de; souvik.agasti@uhasselt.be; mail@ihf.uni-stuttgart.de |
Keywords: | Dielectrics;Magnetic resonance;Magnetic moments;Magnetic domains;Plasmons;Mie scattering;Electromagnetics;Anapole;dimer;electromagnetic scattering;Mie theory;millimeter wave (mm-wave);sensor;spherical dielectric resonator | Document URI: | http://hdl.handle.net/1942/36665 | ISSN: | 0018-926X | e-ISSN: | 1558-2221 | DOI: | 10.1109/TAP.2021.3111312 | ISI #: | 000751857700038 | Rights: | 2021 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See https://www.ieee.org/publications/rights/index.html for more information. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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FINAL VERSION (1).pdf | Peer-reviewed author version | 12.69 MB | Adobe PDF | View/Open |
Analysis of Anapole States in Dielectric Spheres and Application to Near-Field Enhancement.pdf Restricted Access | Published version | 9.31 MB | Adobe PDF | View/Open Request a copy |
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