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Negative refraction of left-handed behavior in porous alumina with infiltrated silver at an optical wavelength
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Band structure ( polarization) of a PC of porous alumina (triangular lattice) with infiltrated silver. The lattice constant and the radius of silver nanowires . Dashed line indicates the frequency at which . Dashed-dotted line is the light line in air. (b) 3D band structure of the second band. (c) EFCs for the second band. The numbers mark the frequencies in unit of . (d) The effective refractive index as the frequency varies in the second band.

Image of FIG. 2.
FIG. 2.

(Color online) Intensity distributions (calculated with FDTD) of slab focusing for polarization at [(a)–(e) with the same PC as in Fig. 1] and for E polarization at [(f) with and ]. The slab contains 11-layer silver nanowires for (a)–(e), and five-layer silver nanowires for (e) and (f). The object distance is in (a) and (b), in (c), in (d), and in (e) and (f). Absorption is considered only in (a). For comparison, (a)–(d) are plotted in the same color scale (with blue to red indicating zero to maximal intensity). Black contours outline the slab structure.

Image of FIG. 3.
FIG. 3.

(Color online) Field distribution (calculated with FDTD) for refraction of a polarization Gaussian beam (incident from the left) by (a) a wedge of the PC of negative refraction (considered in Ref. 17) (i.e., a square lattice of silver rods in air with radius at ); and (b) a wedge of the proposed PC of negative refraction (as in Fig. 1 at ). Blue, white, and red indicate negative, zero, and positive values, respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Negative refraction of left-handed behavior in porous alumina with infiltrated silver at an optical wavelength