Details

Autor(en) / Beteiligte

• Miroshnichenko, Andrey E
• Evlyukhin, Andrey B
• Yu, Ye Feng
• Bakker, Reuben M
• Chipouline, Arkadi
• Kuznetsov, Arseniy I
• Luk'yanchuk, Boris
• Chichkov, Boris N
• Kivshar, Yuri S

Titel

Nonradiating anapole modes in dielectric nanoparticles

Ist Teil von

• Nature communications, 2015-08, Vol.6 (1), p.8069-8069, Article 8069

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.