%0 Journal Article %T Diffraction-free nonevanescent nano-beams using the Fresnel-waveguide concept %A M. I. Mechler %A Z. Tibai %A S. V. Kukhlevsky %J Physics %D 2013 %I arXiv %X Strong intensity attenuation limits the use of conventional diffraction-free optical elements. We show a possible solution to the exponential intensity attenuation limiting the use of Fresnel-type diffraction-free nanometer-scale optics by using materials with appropriately chosen refractive index. Such beams may be applied for technical and physical problems. %U http://arxiv.org/abs/1301.3712v1