Silicon Dioxide Ultraviolet to Visible Phosphors Material

European Ultraviolet-visible Observatory

Fluorescent silicon carbide as an ultraviolet-to-visible light converter by control of donor to acceptor recombinations

Ultraviolet-visible non-supercontinuum ultrafast source enabled by switching single silicon strand-like photonic crystal fibers.

Cherenkov radiation from short photonic crystal fiber with a high air-fill fraction can selectively convert the 1020 nm fs pump pulses from a laser oscillator to the fundamental-mode signal pulses at a significantly shorter wavelength. Across the ultraviolet-visible spectral region, the typical fiber output is characterized by a single isolated Cherenkov band having a multimilliwatt-level avera...

Silicon/silicon Dioxide Nanostructure in Electrostatic Field

Paper presents a numerical analysis of quantum states and probability ψψ* function of a Si/SiO2 nanostructure in varying electrostatic field. The position of probability function peak xp is traced and the bias, under which it abandons the structure (emission or discharging bias), is determined. Variations of the ground state energy with the bias is also examined. The Poisson Schrödinger model o...

Cerium-Doped Zirconium Dioxide, a Visible-Light-Sensitive Photoactive Material of Third Generation.

The dispersion of small amounts of Ce(4+) ions in the bulk of ZrO2 leads to a photoactive material sensitive to visible light. This is shown by monitoring with EPR the formation and the reactivity of photogenerated (λ > 420 nm) charge carriers. The effect, as confirmed by DFT calculations, is due to the presence in the solid of empty 4f Ce states at the mid gap, which act as intermediate levels...