Diffraction-free subwavelength-beam optics at nanometer scale

S. V. Kukhlevsky, M. Mechler

Research output: Contribution to journalArticle

17 Citations (Scopus)


We show that a subwavelength nanometer-sized beam propagating without diffractive broadening can be produced in free space by the constructive interference of multiple beams of a Fresnel source of the respective high-refraction-index waveguide. Such a source can be constructed not only for continuous waves, but also for ultra-short pulses. The results theoretically demonstrate the feasibility of completely diffraction-free subwavelength-beam optics at nanometer scale, for both continuous waves and near single-cycle pulses. The approach extends the operation principle of the near-field subwavelength-beam optics, such as near-field scanning optical microscopy and spectroscopy, to the "not-too-distant" field regime (0.1 to about 0.5 wavelengths).

Original languageEnglish
Pages (from-to)35-43
Number of pages9
JournalOptics Communications
Issue number1-6
Publication statusPublished - Feb 15 2004


  • Diffraction and scattering
  • Near-field scanning microscopy
  • Ultrafast processes and optical pulse generation and pulse compression

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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