Browsing General by Author "Poulton, Christopher"

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Browsing General by Author "Poulton, Christopher"

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  • Podlipensky, A; Szarniak, P; Joly, N; Poulton, Christopher; Russell, P (Optical Society of America, 2007)
    We demonstrate experimentally the formation and stable propagation of bound soliton pairs in a highly nonlinear photonic crystal fiber. The bound pairs occur at a particular power as the consequence of high-order soliton ...
  • 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 ...
  • Mahmoodian, Sahand; Sipe, John; Poulton, Christopher; Dossou, Kokou; Botten, Lindsay; Mcphedran, Ross; De Sterke, C (Optical Society of America, 2012)
    We present a first-principles method to compute radiation properties of ultra-high quality factor photonic crystal cavities. Our Frequency-domain Approach for Radiation (FAR) can compute the far-field radiation pattern and ...
  • Schwefel, H; Poulton, Christopher (Optical Soc Amer, 2009)
    We present a numerically improved multipole formulation for the calculation of resonances of multiple disks located at arbitrary positions in a 2-d plane, and suitable for the accurate computation of the resonances of large ...
  • Kan, Dougal; Asatryan, Ara; Poulton, Christopher; Dossou, Kokou; Botten, Lindsay (Optical Society of America, 2011)
    We extend the fictitious source superposition method in order to model linear defects in photonic woodpiles, and we use the method to model a waveguide that is created by changing either the radius or refractive index of ...
  • Dossou, Kokou; Poulton, Christopher; Botten, Lindsay; Mahmoodian, Sahand; Mcphedran, Ross; De Sterke, C (American Physical Society, 2009)
    We consider the modal fields and resonance frequencies of composite defects in two-dimensional photonic crystals (PCs). Using an asymptotic method based on Green's functions, we show that the coupling matrices for the ...
  • Kan, Dougal; Asatryan, Ara; Poulton, Christopher; Botten, Lindsay (Optical Society of America, 2010)
    We extend the multipole method to allow for rod-type defects in woodpiles composed of infinitely long cylinders. A coupled-resonator optical waveguide and a linear waveguide are considered, where each waveguide is embedded ...
  • Koos, Christian; Jacome, L; Poulton, Christopher; Leuthold, Juerg; Freude, Wolfgang (Optical Society of America, 2007)
    Values up to gamma = 7?106/(Wkm) for the nonlinear parameter are feasible if silicon-on-insulator based strip and slot waveguides are properly designed. This is more than three orders of magnitude larger than for ...
  • Fujii, Masafumi; Maitra, Ayan; Poulton, Christopher; Leuthold, Juerg; Freude, Wolfgang (Optical Society of America, 2006)
    We investigate numerically a non-reciprocal switching behavior in strongly modulated waveguide Bragg gratings (WBGs) having a longitudinally asymmetric stopband configuration. The minimum power predicted for a stable ...
  • Koos, Christian; Jacome, L; Poulton, Christopher; Leuthold, Juerg; Freude, Wolfgang (Optical Society of America, 2007)
    We numerically investigate the band structure and guided modes within arrays of metallic nanowires. We show that bandgaps appear for a range of array geometries and that these can be used to guide light in these structures. ...
  • 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 ...
  • Mahmoodian, Sahand; Sukhorukov, Andrey; Ha, Sangwoo; Lavrinenko, Andrei; Poulton, Christopher; Dossou, Kokou; Botten, Lindsay; Mcphedran, Ross; De Sterke, C (Optical Society of America, 2010)
    We investigate the modes of double heterostructure cavities where the underlying photonic crystal waveguide has been dispersion engineered to have two band-edges inside the Brillouin zone. By deriving and using a perturbative ...
  • Poulton, Christopher; Mueller, Manfred; Freude, Wolfgang (Optical Society of America, 2005)
    We present results from a new method for the solution of electromagnetic scattering from finite sets of two-dimensional cylinders exhibiting sidewall deformations. Our model treats the sidewall deviation as a small ...
  • Dossou, Kokou; Botten, Lindsay; Mcphedran, Ross; Poulton, Christopher; Asatryan, Ara; De Sterke, C (American Physical Society, 2008)
    We investigate localized defect states near the edge of a band gap in a two-dimensional photonic crystal. An asymptotic approach based on Green's functions leads to analytical results both for the frequency and for the ...