Browsing General by Author "Asatryan Ara"

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Browsing General by Author "Asatryan Ara"

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  • Efficient couplers for photonic crystal waveguides 
    Dossou Kokou; Botten Lindsay; De Sterke C; Mcphedran Ross; Asatryan Ara; Chen Swee; Brnovic Jovana (Elsevier Science, 2006)
    We use two-dimensional simulations to study the design of tapers to provide efficient, low reflection coupling between a waveguide in a two-dimensional photonic crystal (PC) and free space. We find that, largely independent ...
  • Evidence Of A Mobility Edge For Photons In Two Dimensions 
    Asatryan Ara; Botten Lindsay; Byrne Michael; Mcphedran Ross; De Sterke C (American Physical Society, 2007)
    We demonstrate for the first time a nonlinear finite-difference time-domain (FDTD) analysis of optical parametric four-wave mixing (FWM) in an actual InGaAsP–InP-based racetrack microresonator, and the results are ...
  • Exact modelling of generalised defect modes in photonic crystal structures 
    Botten Lindsay; Dossou Kokou; Wilcox Stuart; Mcphedran Ross; De Sterke C; Nicorovici Nicolae; Asatryan Ara (Elsevier Science Bv, 2007)
    An exact theory for modelling modes of generalised defects in 2D photonic crystals (PCs) with a genuinely infinite cladding is presented. The approach builds on our fictitious source superposition method for simple defects ...
  • Exact modelling of generalised defect modes in photonic crystal structures 
    Dossou Kokou; Botten Lindsay; Wilcox Stuart; Mcphedran Ross; De Sterke C; Nicorovici Nicolae; Asatryan Ara (Elsevier Science Bv, 2007)
    An exact theory for modelling modes of generalised defects in 2D photonic crystals (PCs) with a genuinely infinite cladding is presented. The approach builds on our fictitious source superposition method for simple defects ...
  • Gap-edge asymptotics of defect modes in two-dimensional photonic crystals 
    Dossou Kokou; Mcphedran Ross; Botten Lindsay; Asatryan Ara; De Sterke C (Optical Society of America, 2007)
    We consider defect modes created in complete gaps of 2D photonic crystals by perturbing the dielectric constant in some region. We study their evolution from a band edge with increasing perturbation using an asymptotic ...
  • Local observation of modes from three-dimensional woodpile photonic crystals with near-field microspectroscopy under supercontinuum illumination 
    Jia Baohua; Norton Andrew; Li Jiafang; Rahmani Adel; Asatryan Ara; Botten Lindsay; Gu Min (Optical Society of America, 2008)
    A near-field microscope coupled with a near-infrared (NIR) supercontinuum source is developed and applied to characterize optical modes in a three-dimensional (3D) woodpile photonic crystal (PC) possessing a NIR partial ...
  • Shallow defect states in two-dimensional photonic crystals 
    Asatryan Ara; Poulton Christopher; Dossou Kokou; Mcphedran Ross; Botten Lindsay; 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 ...