Optical forces in nanowire pairs and metamaterials
Artikel i vetenskaplig tidskrift, 2010

We study the optical force arising when isolated gold nanowire pairs and metamaterials with a gold nanowire pair in the unit cell are illuminated with laser radiation. Firstly, we show that isolated nanowire pairs are subject to much stronger optical forces than nanospheres due to their stronger electric and magnetic dipole resonances. We also investigate the properties of the optical force as a function of the length of the nanowires and of the distance between the nanowires. Secondly, we study the optical force in a metamaterial that consists of a periodic array of nanowire pairs. We show that the ratio of the size of the unit cell to the length of the nanowires determines whether the electric dipole resonance leads to an attractive or a repulsive force, and we present the underlying physical mechanism for this effect.

optical force

nanowire pair

plasmonics

metamaterials

Författare

Rongkuo Zhao

Philippe Tassin

Chalmers, Teknisk fysik, Kondenserade materiens teori

Thomas Koschny

Costas M. Soukoulis

Optics Express

1094-4087 (ISSN)

Vol. 18 25 25665-25676

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Atom- och molekylfysik och optik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1364/OE.18.025665