English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this article, the scattering of surface plasmon polaritons (SPPs) intophotons at holes is investigated. A local, electrically excited source of SPPsusing a scanning tunnelling microscope (STM) produces an outgoing circularplasmon wave on a thick (200 nm) gold film on glass containing holes of 250,500 and 1000 nm diameter. Fourier plane images of the photons fromhole-scattered plasmons show that the larger the hole diameter, the moredirectional the scattered radiation. These results are confirmed by a modelwhere the hole is considered as a distribution of horizontal dipoles whoserelative amplitudes, directions, and phases depend linearly on the local SPPelectric field. An SPP-Young's experiment is also performed, where theSTM-excited SPP-wave is incident on a pair of 1 $\mu$m diameter holes in thethick gold film. The visibility of the resulting fringes in the Fourier planeis analyzed to show that the polarization of the electric field is maintainedwhen SPPs scatter into photons. From this SPP-Young's experiment, an upperbound of $\approx$ 200 nm for the radius of this STM-excited source of surfaceplasmon polaritons is determined.

Plasmon scattering from holes: from single hole scattering to Young's experiment