L. Yu et al., "Fractional Fourier transform and the elliptic gradient-index medium," Opt. Commun., vol. 152, pp. 23-25, 1998.YU L,HUANG M C,WU L Q,et al.Fractional Fourier transform and the elliptic gradient-index medium. Optics Communication . 1998...
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In both cases, the background medium outside the lens has refractive indices na and nb for the upper and lower waveguides, respectively. Full size image In this paper, a generalization of this particular case is introduced, which defines a new family of inhomogeneous lenses with possible ...
for example, the control of freely propagating waves (PWs; refs1,2,3,4,5,6) and surface waves (SWs; refs7,8,9,10) has separately become possible using transformation optics and metamaterials, a bridge linking both propagation types has not yet been found. Such a device has particular...
We calculate the transmittance function for this kind of medium under a paraxial approximation by a quasi-geometrical approach. Likewise, we analyze the pupil effect; that is, we evaluate the intensity distribution diffracted by a gradient-index axicon at the image plane....
Surface waves propagating along the interface between a parabolic graded-index medium and a self-focusing nonlinear medium: exact analytical solution Surface waves propagating along the planar interface between an exponentially graded-index medium and the non-Kerr-type nonlinear medium are described anal....
-Itwassuggestedthattheattenuation,energyabsorption,scattering,andspreadingwasduetoimpuritiesinglassfibers -Itwasspeculatedthatifattenuationcouldbereducedtounder20dBperkilometer,thenfiberopticswouldbecomeapracticalcommunicationmedium -In1970itwasdemonstratedthatafiberwith17dBattenuationperkilometercouldbemadebydopingpuresilic...
In addition, the wave reflection at the left boundary (subject to the incident wave) is very weak because of the small refractive index difference between the host medium and the metamaterial, and will be gradually increased with the change of the refractive index inside the metamaterial. However...
Alternatively, local phase shifts may be induced by greatly increasing the wave path length nd (where n is the refractive index and d is the thickness of the material) while keeping subwavelength thicknesses with respect to the background medium. In acoustics, the concept of coiling space7,8,...
Two monitor TFCCD lenses are designed with foci 50mm and F2.8 used for factory with 1024×1024pixels and image element 15μm×15μm.One is traditionally overall spherical lens,the other is a lens including two axial gradient index medium.The lenses are compared and found that the latter get...