“…Nanostructured metamaterials are expected to play a key role in the development of a new family of photonic devices with unparallel properties. Unlike ordinary, positiveindex (PI) materials, the energy flow and wave vector (phase velocity) are counter-directed in NIMs, which determines their extraordinary linear and nonlinear optical (NLO) properties (see, e.g., [1][2][3][4][5][6][7] and references therein). Significant progress has been achieved recently in the design of bulk, multilayered, negative-index, plasmonic slabs.…”