TY - JOUR

T1 - Nonradiating anapole modes in dielectric nanoparticles

AU - Miroshnichenko, Andrey E.

AU - Evlyukhin, Andrey B.

AU - Yu, Ye Feng

AU - Bakker, Reuben M.

AU - Chipouline, Arkadi

AU - Kuznetsov, Arseniy I.

AU - Luk'yanchuk, Boris

AU - Chichkov, Boris N.

AU - Kivshar, Yuri S.

N1 - Funding information: We thank N. Zheludev and M. Berry for useful discussions, and their great interest to this work. The work of A.E.M. was supported by the Australian Research Council via Future Fellowship program (FT110100037). The authors at DSI were supported by DSI core funds. Fabrication, Scanning Electron Microscope Imaging and NSOM works were carried out in facilities provided by SnFPC@DSI (SERC Grant 092 160 0139). Zhen Ying Pan (DSI) is acknowledged for SEM imaging. Yi Zhou (DSI) is acknowledged for silicon film growth. Leonard Gonzaga (DSI), Yeow Teck Toh (DSI) and Doris Ng (DSI) are acknowledged for development of the silicon nanofabrication procedure. B.N.C. acknowledges support from the Government of Russian Federation, Megagrant No. 14.B25.31.0019.

PY - 2015/8/27

Y1 - 2015/8/27

N2 - Nonradiating current configurations attract attention of physicists for many years as possible models of stable atoms. One intriguing example of such a nonradiating source is known as "anapole". An anapole mode can be viewed as a composition of electric and toroidal dipole moments, resulting in destructive interference of the radiation fields due to similarity of their far-field scattering patterns. Here we demonstrate experimentally that dielectric nanoparticles can exhibit a radiationless anapole mode in visible. We achieve the spectral overlap of the toroidal and electric dipole modes through a geometry tuning, and observe a highly pronounced dip in the far-field scattering accompanied by the specific near-field distribution associated with the anapole mode. The anapole physics provides a unique playground for the study of electromagnetic properties of nontrivial excitations of complex fields, reciprocity violation and Aharonov-Bohm like phenomena at optical frequencies.

AB - Nonradiating current configurations attract attention of physicists for many years as possible models of stable atoms. One intriguing example of such a nonradiating source is known as "anapole". An anapole mode can be viewed as a composition of electric and toroidal dipole moments, resulting in destructive interference of the radiation fields due to similarity of their far-field scattering patterns. Here we demonstrate experimentally that dielectric nanoparticles can exhibit a radiationless anapole mode in visible. We achieve the spectral overlap of the toroidal and electric dipole modes through a geometry tuning, and observe a highly pronounced dip in the far-field scattering accompanied by the specific near-field distribution associated with the anapole mode. The anapole physics provides a unique playground for the study of electromagnetic properties of nontrivial excitations of complex fields, reciprocity violation and Aharonov-Bohm like phenomena at optical frequencies.

UR - http://www.scopus.com/inward/record.url?scp=84940524677&partnerID=8YFLogxK

U2 - 10.1038/ncomms9069

DO - 10.1038/ncomms9069

M3 - Article

AN - SCOPUS:84940524677

VL - 6

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 8069

ER -