Abstract
We numerically investigate the optical transmission through a compound spherical stack with conventional and metamaterial (MM) layers and also embedded MM defect. A formation of extremely narrow resonant peak with nearly complete transmittance in area of a band gap is found. We demonstrate that photon fields of certain frequencies can be strongly confined by a left-handed (LH) defect. The influence of a random deviation in the width of compound spherical layers as well the transit to the whispering gallery mode (WGM) is also discussed.
Highlights
Controlling the electromagnetic properties of materials, going beyond the limit that is attainable with naturally existing substances, has become a reality with the advent of metamaterials [1, 2]
In recent experiment [6] it has been demonstrated that the incorporation of the gain material in the metamaterial makes it possible to fabricate an extremely low-loss and an active optical negative-index metamaterial (NIM) that is not limited by the inherent loss in its metal constituent
Epoxy doped with rhodamine 800 (Rh800) and dye is used as a gain medium
Summary
Controlling the electromagnetic properties of materials, going beyond the limit that is attainable with naturally existing substances, has become a reality with the advent of metamaterials [1, 2]. In recent experiment [6] it has been demonstrated that the incorporation of the gain material (rhodamine 800) in the metamaterial makes it possible to fabricate an extremely low-loss and an active optical negative-index metamaterial (NIM) that is not limited by the inherent loss in its metal constituent In this experiment the optical (NIM) structure (silver layers + rhodamine 800) is the fishnet with periodicity about 300 nm. If the metamaterial layers (with negative refraction index) are included in such a stack the width of the resonant peaks in the frequency spectrum becomes extremely narrow [22] It is found the formation and coupling of defect modes in two-dimensional photonic crystal (PC) band gaps associated with degenerate edges [23]. The influence of a random deviation in the width of compound spherical layers as well the transit to whisperinggallery mode (WGM) is discussed
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