http://www.cnr.it/ontology/cnr/individuo/prodotto/ID311180
Generation of nondiffracting electron bessel beams (Articolo in rivista)
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- Label
- Generation of nondiffracting electron bessel beams (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevX.4.011013 (literal)
- Alternative label
Grillo, Vincenzo[ 1 ] ; Karimi, Ebrahim[ 2 ] ; Gazzadi, Gian Carlo[ 1 ] ; Frabboni, Stefano[ 1,3 ] ; Dennis, Mark R.[ 4 ] ; Boyd, Robert W.[ 2,5 ] (2014)
Generation of nondiffracting electron bessel beams
in Physical review. X
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Grillo, Vincenzo[ 1 ] ; Karimi, Ebrahim[ 2 ] ; Gazzadi, Gian Carlo[ 1 ] ; Frabboni, Stefano[ 1,3 ] ; Dennis, Mark R.[ 4 ] ; Boyd, Robert W.[ 2,5 ] (literal)
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- http://www.scopus.com/inward/record.url?eid=2-s2.0-84900332655&partnerID=q2rCbXpz (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- [ 1 ] CNR, Ist Nanosci, I-41125 Modena, Italy
[ 2 ] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
[ 3 ] Univ Modena & Reggio Emilia, Dipartimento Fis Informat Matemt FIM, I-41125 Modena, Italy
[ 4 ] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[ 5 ] Univ Rochester, Inst Opt, Rochester, NY 14627 USA (literal)
- Titolo
- Generation of nondiffracting electron bessel beams (literal)
- Abstract
- Almost 30 years ago, Durnin discovered that an optical beam with a transverse intensity profile in the form of a Bessel function of the first order is immune to the effects of diffraction. Unlike most laser beams, which spread upon propagation, the transverse distribution of these Bessel beams remains constant. Electrons also obey a wave equation (the Schrödinger equation), and therefore Bessel beams also exist for electron waves. We generate an electron Bessel beam by diffracting electrons from a nanoscale phase hologram. The hologram imposes a conical phase structure on the electron wave-packet spectrum, thus transforming it into a conical superposition of infinite plane waves, that is, a Bessel beam. We verify experimentally that these beams can propagate for 0.6 m without measurable spreading and can also reconstruct their intensity distributions after being partially obstructed by an obstacle. Finally, we show by numerical calculations that the performance of an electron microscope can be increased dramatically through use of these beams. (literal)
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