We demonstrate an ultrathin, broadband half-wave plate in the near-infrared range using a plasmonic metasurface. Simulated and experimental results indicate that such a broadband and high-efficiency performance is sustained over a wide range of incident angles.
We present an experimental study of a metasurface, which exhibits electric and magnetic resonances, in order to understand their independent contributions to second-harmonic generation. A hydrodynamic model framework is used to match experimental results.
We developed an accurate three dimensional time domain model of a 4-level gain system fitted to lasing experiment with a silver nanohole array. The simulated emission intensity showed clear lasing effects confirmed by optical experiments.
We propose a new scheme to generate polychromatic holograms by manipulating the Pancharatnam-Berry phase. Using anisotropic transmission characteristics and tuning the resonant wavelengths of nanoslits, multicolor holograms can be produced for arbitrary RGB images.
Fabry-Pérot nano-cavities with metasurface mirrors are developed to obtain multi-band resonances at the wavelengths that exceed the diffraction limit. Independently tuned resonance bands are thus not limited to the integer multiples of a fundamental tone.