Browsing 02 Physical Sciences by Author "Mahmoodian, Sahand"

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Browsing 02 Physical Sciences by Author "Mahmoodian, Sahand"

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  • Brownless, John; Mahmoodian, Sahand; Dossou, Kokou; Lawrence, Felix; Botten, Lindsay; De Sterke, C (Optical Society of America, 2010)
    We investigate dispersion curves of coupled waveguides in hexagonal lattices. We find that their coupling coefficients change magnitude and sign along the BZ and that the modes here are no longer odd and even modes.
  • Brownless, John; Mahmoodian, Sahand; Dossou, Kokou; Lawrence, Felix; Botten, Lindsay; De Sterke, C (Optical Society of America, 2010)
    We investigate the modes of coupled waveguides in a hexagonal photonic crystal. We find that for a substantial parameter range the coupled waveguide modes have dispersion relations exhibiting multiple intersections, which ...
  • Mahmoodian, Sahand; Dossou, Kokou; Poulton, Christopher; Mcphedran, Ross; Botten, Lindsay; De Sterke, C (Optical Society of America, 2010)
    We present a new method for designing mode fields of 3D photonic crystal heterostructure cavities. The method is several orders of magnitude faster than existing numerical methods and enables rapid design of heterostructure ...
  • 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 ...
  • Dossou, Kokou; Botten, Lindsay; Mahmoodian, Sahand; Mcphedran, Ross; Poulton, Christopher; Asatryan, Ara; De Sterke, C (IEEE, 2008)
    We demonstrate the existence of a class of defects in 2D photonic crystals, for which the eigenstates depend only on the defect geometry, and not on details Re photonic crystal parameters or defect size.
  • 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 ...
  • 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 ...