Phase-change chalcogenide glass metamaterial

Combining metamaterials with functional media brings a new dimension to their performance. Here we demonstrate substantial resonance frequency tuning in a photonic metamaterial hybridized with an electrically/optically switchable chalcogenide glass. The transition between amorphous and crystalline forms brings about a 10% shift in the near-infrared resonance wavelength of an asymmetric split-ring array, providing transmission modulation functionality with a contrast ratio of 4:1 in a device of sub-wavelength thickness.Comment: 3 pages, 3 figure

Ultrafast active plasmonics

We report on the experimental demonstration of femtosecond optical modulation of plasmonic signals and analyse the nonlinear propagation and active manipulation of short plasmon pulses

Femtosecond surface plasmon pulse propagation

We analyze ultrafast surface plasmon-polariton pulse reshaping effects and nonlinear propagation modes for metal/dielectric plasmon waveguides. It is found that group velocity and loss dispersion effects can substantially modify both pulse duration (broadening/narrowing) and intensity decay (acceleration/retardation) by as much as several tens of percentage points in the short-pulse regime and that metallic nonlinearities alone may support soliton, self-focusing, and self-compressing modes

Phase-change chalcogenide glasses in active plasmonics

Light-induced structural phase transitions in chalcogenide glasses bring about substantial changes in optical properties. This phenomenon is the foundation of current CD and DVD data storage technology. Here we show that phase changes in novel chalcogenide glasses can be used to actively control signals in plasmonic devices

Thyroglobulin level at week 16 of pregnancy is superior to urinary iodine concentration in revealing preconceptual and first trimester iodine supply

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