Leaky wave lenses for spoof plasmon collimation

Anastasios H. Panaretos, Douglas Henry Werner

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We theoretically demonstrate the feasibility of collimating radiating spoof plasmons using a leaky wave lens approach. Spoof plasmons are surface waves excited along reactance surfaces realized through metallic corrugations. By employing a periodic perturbation to the geometric profile of this type of reactance surface, it becomes feasible to convert the excited spoof plasmons into free-space radiating leaky wave modes. It is demonstrated that by structurally modifying such a corrugated surface through the introduction of a non-uniform sinusoidally modulated reactance profile, then a tapered wavenumber, with a real part less than that of free space, can be established along the surface. In this way the radiating properties of the structure (amplitude and phase) can be locally controlled thereby creating a radiating effect similar to that of a non-uniform current distribution. By properly engineering the space dependent wavenumber along the corrugated surface, different regions of the structure will emit spoof plasmon energy at different angles with varying intensity. The combined effect is the emission of an electromagnetic wave exhibiting a converging wave-front that eventually collimates spoof plasmon energy at some desired focal point.

Original languageEnglish (US)
Pages (from-to)14654-14671
Number of pages18
JournalOptics Express
Volume24
Issue number13
DOIs
StatePublished - Jun 27 2016

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collimation
reactance
lenses
plasmons
current distribution
profiles
wave fronts
surface waves
electromagnetic radiation
engineering
perturbation
energy

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Panaretos, Anastasios H. ; Werner, Douglas Henry. / Leaky wave lenses for spoof plasmon collimation. In: Optics Express. 2016 ; Vol. 24, No. 13. pp. 14654-14671.
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Leaky wave lenses for spoof plasmon collimation. / Panaretos, Anastasios H.; Werner, Douglas Henry.

In: Optics Express, Vol. 24, No. 13, 27.06.2016, p. 14654-14671.

Research output: Contribution to journalArticle

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