Whirling plasmons: Angular momentum selection rule

Yuri Gorodetski, Nir Shitrit, Itay Bretner, Vladimir Kleiner, Erez Hasman

Research output: Contribution to specialist publicationArticle

2 Scopus citations

Abstract

A study was conducted to demonstrate a plasmonic nanostructure that exhibited a crucial role of an angular momentum (AM) selection rule in a light-surface plasmon scattering process. The intrinsic AM of the incident radiation was coupled to the extrinsic momentum of the surface plasmons through spin-orbit interaction that was was manifested by a geometric Berry phase. This effect helped in achieving a symmetry breaking that resulted in a spin-dependent enhanced transmission through coaxial nanoapertures in rotationally symmetric structures. The coaxial nanoaperture was milled by a focused ion beam into a 200-nm-thick gold film evaporated onto a glass wafer. The inner and the outer radii of the ring slit were 250 and 350 nm, while the aperture was designed to be a single mode system.

Original languageEnglish
Pages26
Number of pages1
Volume20
No12
Specialist publicationOptics and Photonics News
DOIs
StatePublished - 1 Jan 2009
Externally publishedYes

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