Bifacial Metasurface with Quadrupole Optical Response - Kölner UniversitätsPublikationsServer

Shevchenko, Andriy ORCID: 0000-0002-7621-2830, Kivijarvi, Ville, Grahn, Patrick, Kaivola, Matti ORCID: 0000-0001-5047-5846 and Lindfors, Klas ORCID: 0000-0002-6482-5605 (2015). Bifacial Metasurface with Quadrupole Optical Response. Phys. Rev. Appl., 4 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2331-7019

Full text not available from this repository.

DOI:10.1103/PhysRevApplied.4.024019

Abstract

We design, fabricate, and characterize a metasurface, whose multipole optical response depends significantly on the illumination direction. The metasurface is composed of gold-nanodisc dimers embedded in glass. In spite of their nanoscale size, the dimers exhibit a dominating electric-current-quadrupole response in a wide range of wavelengths around 700 nm when illuminated from one side, and a primarily electric-dipole response when illuminated from the opposite side. This leads to two consequences. First, the reflection coefficient of the metasurface considerably differs for the two sides of illumination. Second, quadrupole excitation results in a significant local enhancement of both electric and magnetic fields around the dimers. Our experimental spectroscopic data are in good agreement with simulations obtained using a multipole expansion model.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Shevchenko, Andriy	UNSPECIFIED	orcid.org/0000-0002-7621-2830	UNSPECIFIED
Kivijarvi, Ville	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Grahn, Patrick	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Kaivola, Matti	UNSPECIFIED	orcid.org/0000-0001-5047-5846	UNSPECIFIED
Lindfors, Klas	UNSPECIFIED	orcid.org/0000-0002-6482-5605	UNSPECIFIED