Browsing 02 Physical Sciences by Author "Elliman Robert"

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Browsing 02 Physical Sciences by Author "Elliman Robert"

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  • Linear optical properties of Ge nanocrystals in silica 
    Dowd Annette; Elliman Robert; Luther-Davies Barry (American Institute of Physics, 2001)
    The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant ...
  • Nonlinear Optical Properties Of Semiconducting Nanocrystals In Fused Silica 
    Dowd Annette; Samoc Marek; Luther-Davies Barry; Elliman Robert (Elsevier Science Bv, 1999)
    Degenerate four-wave mixing (DFWM) is used to examine the nonlinear optical response of Ge nanocrystals in a silica matrix. The nanocrystals are formed by implanting 1.0 MeV Ge ions into silica to a dose of 3.0x10(17) Ge ...
  • Nonlinear Optical Response Of Ge Nanocrystals In A Silica Matrix 
    Dowd Annette; Elliman Robert; Samoc Marek; Luther-Davies Barry (Amer Inst Physics, 1999)
    Time-resolved degenerate-four-wave-mixing measurements were used to study the nonlinear optical response (intensity-dependent refractive index! of Ge nanocrystallites embedded in a silica matrix. Nanocrystals were fabricated ...
  • Physical and optical characterisation of Ge-implanted silica 
    Dowd Annette; Llewellyn David; Elliman Robert; Luther-Davies Barry; Samoc Marek; Fitz Gerald John (Elsevier Inc, 2001)
    Ge nanocrystals formed in silica by implantation with 1.0 MeV Ge ions and subsequent annealing at 1100°C were characterised by transmission electron microscopy and Raman spectroscopy. The nanocrystals were found to be ...