@article {4589,
	title = {Observation of diffraction cancellation for nonparaxial beams in the scale-free-optics regime.},
	journal = {Physical Review A: Atomic, Molecular \& Optical Physics},
	volume = {92},
	number = {1-B},
	year = {2015},
	note = {Accession Number: 108999818; Di Mei, F. 1,2 Pierangeli, D. 1 Parravicini, J. 1 Conti, C. 1,3 Agranat, A. J. 4 DelRe, E. 1,3; Email Address: eugenio.delre@uniroma1.it; Affiliation: 1: Dipartimento di Fisica, Universit{\`a} di Roma "La Sapienza," 00185 Rome, Italy 2: Center for Life Nanoscience, Sapienza, Istituto Italiano di Tecnologia, 00161 Rome, Italy 3: ISC-CNR, Universit{\`a} di Roma "La Sapienza," 00185 Rome, Italy 4: Brojde Center for Innovative Engineering and Computer Science, Hebrew University, Jeruslaem 91904, Israel; Source Info: Jul2015, Vol. 92 Issue 1-B, p1; Subject Term: SCALE-free network (Statistical physics); Subject Term: WAVELENGTHS; Subject Term: OPTICAL diffraction; Subject Term: OBSERVATION (Scientific method); Subject Term: PHOTOREFRACTIVE effect; Number of Pages: 5p; Document Type: Article},
	month = {2015/07/15/},
	pages = {1 - 5},
	abstract = {We report the observation of diffraction cancellation for visible beams with widths from tens of wavelengths down to fractions of the optical wavelength. The phenomenon is observed at the transition from diffraction- to antidiffraction-dominated beam propagation, triggered by a thermal shock in a photorefractive nanodisordered lithium-enriched potassium-tantalate-niobate (KTN:Li) crystal. Here beams propagate without distortion, independently of intensity and size. Confirming the main prediction of the scale-free-optics model, we find a single unified light behavior that spans across the entire hierarchy of standard optical spatial scales, from wide plane-wave-like beams that obey geometrical optics down to ultranarrow beams with widths of the order of a single wavelength. [ABSTRACT FROM AUTHOR]Copyright of Physical Review A: Atomic, Molecular \& Optical Physics is the property of American Physical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)},
	keywords = {OBSERVATION (Scientific method), OPTICAL diffraction, Photorefractive effect, SCALE-free network (Statistical physics), WAVELENGTHS},
	isbn = {10502947},
	url = {http://search.ebscohost.com/login.aspx?direct=true\&db=aph\&AN=108999818\&site=eds-live},
	author = {Di Mei, F. and Pierangeli, D and Parravicini, J. and Conti, C. and Agranat, A.J. and DelRe, E.}
}
