In this study, we report multilayer metallo-dielectric stacks that simultaneously possess a zero refractive index and an
impedance match to free space in the near-IR. A genetic algorithm (GA) was used to optimize the screen geometries and
dimensions of the zero index metamaterials (ZIMs) that consisted of alternating gold (Au) and polyimide films.
Examples of three- and nine-layer ZIMs are shown. The fabrication procedure and characterization methods of the
multilayer metallo-dielectric ZIMs are also described.
We experimentally investigated optical Kerr gating effect by
co-propagating a pump beam and a weak signal
beam in a nonlinear photonic crystal fiber. It is shown that optical Kerr gating can be observed by using
femtosecond pump pulses with only a few milliwatts of average power.