Subwavelength anti-diffracting beams propagating over more than 1,000 Rayleigh lengths (Articolo in rivista)

Type
Label
  • Subwavelength anti-diffracting beams propagating over more than 1,000 Rayleigh lengths (Articolo in rivista) (literal)
Anno
  • 2015-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/nphoton.2015.21 (literal)
Alternative label
  • Eugenio DelRe (1); Fabrizio Di Mei (1,2); Jacopo Parravicini (1,3); Gianbattista Parravicini (1); Aharon J. Agranat (4); Claudio Conti (1,5) (2015)
    Subwavelength anti-diffracting beams propagating over more than 1,000 Rayleigh lengths
    in Nature photonics (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Eugenio DelRe (1); Fabrizio Di Mei (1,2); Jacopo Parravicini (1,3); Gianbattista Parravicini (1); Aharon J. Agranat (4); Claudio Conti (1,5) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Letter. With Supplementary information. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2015.21.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • publ. online 02 March (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Physics Department, University of Rome Sapienza, Rome 00185, Italy (2) Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome 00161, Italy (3) Physics Department, University of Pavia, Pavia 27100, Italy (4) Applied Physics Department, Hebrew University of Jerusalem, Jerusalem 91904, Israel (5) Institute for Complex Systems, National Research Council (ISC-CNR), Via dei Taurini 19, Rome 00185, Italy (literal)
Titolo
  • Subwavelength anti-diffracting beams propagating over more than 1,000 Rayleigh lengths (literal)
Abstract
  • Propagating light beams with widths down to and below the optical wavelength require bulky large-aperture lenses and remain focused only for micrometric distances1, 2. Here, we report the observation of light beams that violate this localization/depth-of-focus law by shrinking as they propagate, allowing resolution to be maintained and increased over macroscopic propagation lengths. In nanodisordered ferroelectrics3, 4 we observe a non-paraxial propagation of a sub-micrometre-sized beam for over 1,000 diffraction lengths, the narrowest visible beam reported to date5, 6, 7, 8. This unprecedented effect is caused by the nonlinear response of a dipolar glass, which transforms the leading optical wave equation into a Klein-Gordon-type equation that describes a massive particle field9. Our findings open the way to high-resolution optics over large depths of focus, and a route to merging bulk optics into nanodevices. (literal)
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