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b t-h n, K

By Ics D, Irfan Bulu and Humeyra Caglaya


s tha nth. ed o. We urce ed th ed m of sources when they are placed inside metamaterials permittivity and permeability (real parts) are the 850 OPTICS LETTERS / Vol. 32, No. 7 / April 1, 2007still remain to some extent unexplored. The study of the field emitted from a source, which is placed inside a left-handed medium slab, provides exciting an-swers for both physical and technological consider-ations. First of all, such a study provides the means of checking the validity of ray optics on left-handed medium metamaterials whose overall dimensions are comparable with one wavelength. In addition, the in-formation gained from such studies is important for the applications that incorporate radiation sources and active or nonlinear materials inside left-handed medium metamaterials.7–11 There are several theo-retical studies that investigated the issue of sources inside a metamaterial with permittivity and perme-ability equal to zero. In addition, there are some studies that attempted to use metamaterials to en-hance the characteristics of antennas.12 In the present work, we studied the properties of the electromagnetic fields emitted from a source em-same at 6.3 GHz with a value of −1.24. Moreover, the Fig. 1. Calculated effective medium parameters of the labyrinth-based left-handed medium: real part o

Year: 2006
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