Spatial mode properties of plasmon-assisted transmission

Opt Lett. 2006 Sep 15;31(18):2792-4. doi: 10.1364/ol.31.002792.

Abstract

Orbital angular momentum of photons is explored to study the spatial mode properties of the plasmon-assisted transmission process. We found that photons carrying different orbital angular momenta have different transmission efficiencies, while the coherence between these spatial modes can be preserved.