Browsing 02 Physical Sciences by Author "Luther-Davies, Barry"

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Browsing 02 Physical Sciences by Author "Luther-Davies, Barry"

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  • Lee, Michael; Grillet, Christian; Poulton, Christopher; Monat, C; Smith, Cameron; Magi, Eric; Freeman, Darren; Madden, Steve; Luther-Davies, Barry; Eggleton, Benjamin (Optical Soc Amer, 2008)
    We demonstrate a direct, single measurement technique for characterizing the dispersion of a photonic crystal waveguide (PCWG) using a tapered fiber evanescent coupling method. A highly curved fiber taper is used to probe ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Grillet, Christian; Smith, Cameron; Lee, Michael; Magi, Eric; Moss, D; Eggleton, Benjamin; Freeman, Darren; Madden, Steve; Luther-Davies, Barry; Byrne, Michael; Asatryan, Ara; Botten, Lindsay (IEEE, 2006)
  • Gao, Feng; Pant, R; Li, Eb; Poulton, Christopher; Choi, Dy; Madden, Steve; Luther-Davies, Barry; Eggleton, Benjamin (Optical Soc Amer, 2013)
    We report the first demonstration of a photonic-chip laser frequency sensor using Brillouin mutually-modulated cross-gain modulation (MMXGM). A large sensitivity (~9.5 mrad/kHz) of the modulation phase shift to probe carrier ...
  • Pant, R; Poulton, Christopher; Choi, Dy; Mcfarlane, H; Hile, S; Li, E; Thevenaz, L; Luther-Davies, Barry; Madden, Steve; Eggleton, Benjamin (Optical Soc Amer, 2011)
    We demonstrate on-chip stimulated Brillouin scattering (SBS) in an As2S3 chalcogenide rib waveguide. SBS was characterized in a 7cm long waveguide with a cross-section 4#gm x 850nm using the backscattered signal and ...
  • Byrnes, Adam; Pant, R; Li, Eb; Choi, Dy; Poulton, Christopher; Fan, Sh; Madden, Steve; Luther-Davies, Barry; Eggleton, Benjamin (Optical Soc Amer, 2012)
    We report the first demonstration of a photonic chip based dynamically reconfigurable, widely tunable, narrow pass-band, high Q microwave photonic filter (MPF). We exploit stimulated Brillouin scattering (SBS) in a 6.5 cm ...
  • Pant, R; Byrnes, Andrew; Poulton, Christopher; Li, E; Choi, Dy; Madden, Steve; Luther-Davies, Barry; Eggleton, Benjamin (Optical Soc Amer, 2012)
    We report the first (to our knowledge) demonstration of photonic chip based tunable slow and fast light via stimulated Brillouin scattering. Slow, fast, and negative group velocities were observed in a 7 cm long chalcogenide ...
  • 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 1100A?C were characterised by transmission electron microscopy and Raman spectroscopy. The nanocrystals were found to be ...