Jump to main content
Jump to site search

Issue 7, 2016
Previous Article Next Article

Tailoring unidirectional angular radiation through multipolar interference in a single-element subwavelength all-dielectric stair-like nanoantenna

Author affiliations

Abstract

The study of all-dielectric nanoantennas has become an emerging branch of the study of optical nanoantennas in recent years, with all-dielectric nanoantennas having an outstanding ability to tailor forward and backward unidirectional scattering arising from interference mainly between electric dipoles and magnetic dipoles induced simultaneously inside a nanoparticle. To further control their radiation properties, we demonstrate the off-normal scattering, by a silicon stair-like nanoantenna, of an incident near-infrared plane wave due to multipolar interference. The radiation angle could be tailored over a 20-degree range by tuning the geometric parameters of the nanoantenna. A multipolar model was adopted to interpret the interference among one electric dipole, two magnetic dipoles and one electric quadrupole induced inside the nanoantenna. The maximum radiation angle reached 20° at a wavelength near 1550 nm. Such a stair-like nanoantenna sets a good example for further flexible manipulation of multipolar resonances inside all-dielectric nanoparticles, which is an essential step towards practical application of all-dielectric nanoantennas in the near future.

Graphical abstract: Tailoring unidirectional angular radiation through multipolar interference in a single-element subwavelength all-dielectric stair-like nanoantenna

Back to tab navigation

Publication details

The article was received on 08 Oct 2015, accepted on 12 Jan 2016 and first published on 12 Jan 2016


Article type: Paper
DOI: 10.1039/C5NR06964E
Citation: Nanoscale, 2016,8, 4047-4053
  •   Request permissions

    Tailoring unidirectional angular radiation through multipolar interference in a single-element subwavelength all-dielectric stair-like nanoantenna

    J. Tian, Q. Li, Y. Yang and M. Qiu, Nanoscale, 2016, 8, 4047
    DOI: 10.1039/C5NR06964E

Search articles by author

Spotlight

Advertisements