Diffractionless nanobeams produced by multiple-waveguide metallic nanostructures

Matyas Mechler, S. Kukhlevsky

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Summary: In this chapter, the problem of generating non-diffracting subwavelength nanobeams is considered theoretically, for more realistic waveguide configuration using slit-like waveguides, namely, a multiwaveguide metallic nanostructure was used to generate the multiple beams. The chapter shows that interference and diffraction of the multiple beams in free space results in a subwavelength nanometer-sized beam that propagates without diffraction, broadening to distances a few times beyond the width of the waveguide. It also shows that the diffraction-free propagation is produced at the cost of a great exponential decay. The chapter describes computational results for the generation of subwavelength non-diffracting beams using waveguides made of perfect electric conductors as well as real metals. It first presents the concept of Fresnel waveguides for the subwavelength nanometer-scale domain. The chapter then describes the non-diffracting nanobeams produced by the different multiwaveguide metallic nanostructures. Controlled Vocabulary Terms: conductors; Fresnel diffraction; nanotechnology

Original languageEnglish
Title of host publicationNon-diffracting Waves
PublisherWiley-VCH Verlag
Pages327-338
Number of pages12
ISBN (Electronic)9783527671519
ISBN (Print)9783527411955
DOIs
Publication statusPublished - Oct 4 2013

Keywords

  • Fresnel waveguides
  • Multiwaveguide metallic nanostructure
  • Non-diffracting subwavelength nanobeams

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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