Browsing 02 Physical Sciences by Author "Asatryan Ara"

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Browsing 02 Physical Sciences by Author "Asatryan Ara"

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  • Anderson Localization Of Classical Waves In Weakly Scattering Metamaterials 
    Asatryan Ara; Gredeskul Sa; Botten Lindsay; Byrne Michael; Freilikher Vd; Shadrivov Iv; Mcphedran Ross; Kivshar Y (Amer Physical Soc, 2010)
    We study the propagation and localization of classical waves in one-dimensional disordered structures composed of alternating layers of left-and right-handed materials (mixed stacks) and compare them with structures composed ...
  • Bloch mode scattering matrix methods for modeling extended photonic crystal structures. II. Applications 
    White Tom; Botten Lindsay; De Sterke C; Mcphedran Ross; Asatryan Ara; Langtry Timothy (American Physical Society, 2004)
    We present a rigorous Bloch mode scattering matrix method for modeling two-dimensional photonic crystal structures and discuss the formal properties of the formulation. Reciprocity and energy conservation considerations lead ...
  • Bloch Mode Scattering Matrix Methods For Modeling Extended Photonic Crystal Structures. I. Theory 
    Botten Lindsay; White Tom; Asatryan Ara; Langtry Timothy; De Sterke C; Mcphedran Ross (American Physical Soc, 2004)
    We present a rigorous Bloch mode scattering matrix method for modeling two-dimensional photonic crystal structures and discuss the formal properties of the formulation. Reciprocity and energy conservation considerations ...
  • Conductance of photons and Anderson localization of light 
    Asatryan Ara; Botten Lindsay; Mcphedran Ross; De Sterke C; Langtry Timothy; Nicorovici Nicolae (Optical Society of America, 2004)
    Conductance properties of photons in disordered two-dimensional photonic crystals is calculated using exact multipole expansions technique. The Landauer¿s two-terminal formula is used to calculate average of the conductance, ...
  • Conductance of photons in disordered photonic crystals 
    Asatryan Ara; Botten Lindsay; Byrne Michael; Langtry Timothy; Nicorovici Nicolae; Mcphedran Ross; De Sterke C; Robinson Peter (American Physical Society, 2005)
    The conductance of photons in two-dimensional disordered photonic crystals is calculated using an exact multipole–plane wave method that includes all multiple scattering processes. Conductance fluctuations, the universal ...
  • Density of states functions for photonic crystals 
    Botten Lindsay; Mcorist J; Asatryan Ara; Mcphedran Ross; De Sterke C; Nicorovici Nicolae (American Physical Society, 2004)
    We discuss density of states functions for photonic crystals, in the context of the two-dimensional problem for arrays of cylinders of arbitrary cross section. We introduce the mutual density of states (MDOS), and show that ...
  • Diffusion and anomalous diffusion of light in two-dimensional photonic crystals 
    Asatryan Ara; Robinson Peter; Nicorovici Nicolae; Botten Lindsay; Mcphedran Ross; Langtry Timothy; De Sterke C (American Society for Microbiology, 2007)
    The transport properties of electromagnetic waves in disordered, finite, two-dimensional photonic crystals composed of circular cylinders are considered. Transport parameters such as the transport and scattering mean free ...
  • Effects of disorder in two-dimensional photonic crystal waveguides 
    Asatryan Ara; Langtry Timothy; De Sterke C; Botten Lindsay; Robinson Peter; Mcphedran Ross (American Society for Microbiology, 2003)
    The effects of randomness on the guiding properties of waveguides embedded in disordered twodimensional photonic crystals composed of a finite cluster of circular cylinders of infinite length are investigated for ...
  • Effects of polarization on the transmission and localization of classical waves in weakly scattering metamaterials 
    Asatryan Ara; Botten Lindsay; Byrne Michael; Freilikher Vd; Gredeskul Sa; Shadrivov Iv; Mcphedran Ross; Kivshar Yuri (American Physical Society, 2010)
    We summarize the results of our comprehensive analytical and numerical studies of the effects of polarization on the Anderson localization of classical waves in one-dimensional random stacks. We consider homogeneous stacks ...
  • Efficient couplers for photonic crystal waveguides 
    Mcphedran Ross; Dossou Kokou; Botten Lindsay; Asatryan Ara; De Sterke C; Chen Shigang; Brnovic Jovana (Optical Society of America, 2005)
    We consider the design of efficient couplers between a photonic crystal waveguide and a uniform background material. We show that horn-shaped tapers can provide efficient bi-directional coupling between the waveguide and ...
  • 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 ...
  • Fano resonances of photonic crystal slabs 
    Byrne Michael; Botten Lindsay; Asatryan Ara; Nicorovici Nicolae; Norton Andrew; Mcphedran Ross; De Sterke C (The Institute of Electrical and Electronic Engineers Inc (IEEE), 2006)
    A Bloch mode theory for diffraction of plane waves by planar PC slabs is developed. The theory provides physical insight into the origin of Fano resonances, allowing a simple pole model to be deduced rigorously.
  • Folded Bands In Metamaterial Photonic Crystals 
    Chen Pu; Poulton Christopher; Asatryan Ara; Steel Michael; Botten Lindsay; De Sterke C; Mcphedran Ross (Iop Publishing Ltd, 2011)
    The dispersion relation of periodic structures that include metamaterials or materials with large anomalous dispersion can give bands with infinite group velocity points. These bands do not span the entire first Brillouin ...
  • Frequency shift of sources embedded in finite two-dimensional photonic clusters 
    Asatryan Ara; Botten Lindsay; Nicorovici Nicolae; Mcphedran Ross; De Sterke C (Taylor & Francis, 2006)
    The frequency (Lamb) shift and local density of states (LDOS) in two-dimensional photonic crystals composed of a cluster of infinitely long circular cylinders is calculated classically using the radiation reaction ...
  • From Multipole Methods to Photonic Crystal Device modeling 
    Mcphedran Ross; De Sterke C; Nicorovici Nicolae; Asatryan Ara; Smith Geoff; Langtry Timothy; White Thomas; Botten Lindsay; Fussell David; Kuhlmey Boris (Taylor & Francis, 2006)
  • 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 ...
  • Gap-edge asymptotics of defect modes in twodimensional 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 ...