Chinese Optics Letters, 2011, 9 (5): 052301, Published Online: Apr. 22, 2011
Guided modes in asymmetric metal-cladding left-handed material waveguides Download: 507次
Abstract
We investigate guided modes in the asymmetric waveguide structure with a left-handed material (LHM) layer surrounded by air and metal. A graphical method is proposed to determine the guided modes. New properties of the oscillating and surface guided modes, such as absence of the fundamental mode, coexistence of the oscillating and surface guided modes, fast attenuation of the surface guided modes, and mode degeneracy, are analyzed in detail. We also investigate dispersive characteristics of the metal-LHM-air optical waveguide. The propagation constant increases with decreasing slab thickness for the first-order oscillating mode, which is different from that in traditional metal-cladding waveguides.
Ying He, Xia Zhang, Yanfang Yang, Chunfang Li. Guided modes in asymmetric metal-cladding left-handed material waveguides[J]. Chinese Optics Letters, 2011, 9(5): 052301.