Details
| Original language | English |
|---|---|
| Article number | 2000293 |
| Journal | Annalen der Physik |
| Volume | 532 |
| Issue number | 12 |
| Early online date | 18 Oct 2020 |
| Publication status | Published - 11 Dec 2020 |
Abstract
The existence of non-radiating electromagnetic sources attracts much attention in photonic community and gives rise to extensive discussions of various applications in lasing, medical imaging, sensing, and nonlinear optics. In this article, the existence of magnetic anapole states (or magnetic-type non-radiating sources) characterized by a suppressed magnetic dipole radiation in a dielectric cylindrical particle is theoretically predicted and experimentally demonstrated. The specific features of the magnetic anapole state under ideal conditions are identified, followed by a demonstration of how their existence can be detected in practical structures. The concept is valid in various frequency bands from visible range for nanoparticles to microwave range for millimeter size objects. The experimental study is performed in microwave frequency range which allows not only to measure the far-field (scattered field) characteristics, but also to probe the peculiar field profile directly inside the dielectric particle. The experimental results agree well with the analytical ones and pave the way to detect and identify nontrivial different-type anapole states.
Keywords
- far-field radiation, magnetic anapole states, multipole decomposition, near-field measurements, non-radiating sources
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Annalen der Physik, Vol. 532, No. 12, 2000293, 11.12.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Seeing the Unseen
T2 - Experimental Observation of Magnetic Anapole State Inside a High-Index Dielectric Particle
AU - Kapitanova, Polina
AU - Zanganeh, Esmaeel
AU - Pavlov, Nikita
AU - Song, Mingzhao
AU - Belov, Pavel
AU - Evlyukhin, Andrey
AU - Miroshnichenko, Andrey
N1 - Funding Information: The theoretical investigation of the magnetic anapole state has been supported by Russian Science Foundation project #19‐19‐00693; the experimental investigation of the far and near field characteristics of the dielectric particle has been supported by the Russian Science Foundation project #19‐79‐10232. The work was supported by Australian Research Council, UNSW Scientia Fellowship.The support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453) is acknowledged.
PY - 2020/12/11
Y1 - 2020/12/11
N2 - The existence of non-radiating electromagnetic sources attracts much attention in photonic community and gives rise to extensive discussions of various applications in lasing, medical imaging, sensing, and nonlinear optics. In this article, the existence of magnetic anapole states (or magnetic-type non-radiating sources) characterized by a suppressed magnetic dipole radiation in a dielectric cylindrical particle is theoretically predicted and experimentally demonstrated. The specific features of the magnetic anapole state under ideal conditions are identified, followed by a demonstration of how their existence can be detected in practical structures. The concept is valid in various frequency bands from visible range for nanoparticles to microwave range for millimeter size objects. The experimental study is performed in microwave frequency range which allows not only to measure the far-field (scattered field) characteristics, but also to probe the peculiar field profile directly inside the dielectric particle. The experimental results agree well with the analytical ones and pave the way to detect and identify nontrivial different-type anapole states.
AB - The existence of non-radiating electromagnetic sources attracts much attention in photonic community and gives rise to extensive discussions of various applications in lasing, medical imaging, sensing, and nonlinear optics. In this article, the existence of magnetic anapole states (or magnetic-type non-radiating sources) characterized by a suppressed magnetic dipole radiation in a dielectric cylindrical particle is theoretically predicted and experimentally demonstrated. The specific features of the magnetic anapole state under ideal conditions are identified, followed by a demonstration of how their existence can be detected in practical structures. The concept is valid in various frequency bands from visible range for nanoparticles to microwave range for millimeter size objects. The experimental study is performed in microwave frequency range which allows not only to measure the far-field (scattered field) characteristics, but also to probe the peculiar field profile directly inside the dielectric particle. The experimental results agree well with the analytical ones and pave the way to detect and identify nontrivial different-type anapole states.
KW - far-field radiation
KW - magnetic anapole states
KW - multipole decomposition
KW - near-field measurements
KW - non-radiating sources
UR - http://www.scopus.com/inward/record.url?scp=85092673206&partnerID=8YFLogxK
U2 - 10.1002/andp.202000293
DO - 10.1002/andp.202000293
M3 - Article
AN - SCOPUS:85092673206
VL - 532
JO - Annalen der Physik
JF - Annalen der Physik
SN - 0003-3804
IS - 12
M1 - 2000293
ER -