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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2010-09-26
Local Dispersion of Guiding Modes in Photonic Crystal Waveguide Interfaces and Hetero-Structures
By
Babak Dastmalchi,

    Dr. Babak Dastmalchi

    Universitat Linz

    Austria

    Homepage

Reza Kheradmand,

    Dr. Reza Kheradmand

    Research Institute for Applied Physics and Astronomy

    University of Tabriz

    Iran

    Homepage

Abouzar Hamidipour,

    Dr. Abouzar Hamidipour

    Institute for Communications Engineering and RF-Systems

    Johannes Kepler University of Linz (JKU)

    Austria

    Homepage

Abbas Mohtashami,

    Dr. Abbas Mohtashami

    Physik Department

    Technische Universitat Munchen

    Germany

    Homepage

Kurt Hingerl,

    Dr. Kurt Hingerl

    Institut fur Halbleiter- und Festkorperphysik

    Johannes Kepler Universtat Linz

    Austria

    Homepage

Javad Zarbakhsh

    Dr. Javad Zarbakhsh

    KAI GmbH

    Austria

    Homepage

Progress In Electromagnetics Research B, Vol. 26, 39-52, 2010
doi:10.2528/PIERB10050104 | Google Scholar

Abstract
Recently, we have introduced a numerical method for calculating local dispersion of arbitrary shaped optical waveguides, which is based on the Finite-Difference Time-domain and filter diagonalization technique. In this paper we present a study of photonic crystal waveguides at interfaces and double hetero-structure waveguides. We have studied the waveguide stretching effect, which is the change in lattice constant of photonic crystals along waveguiding direction. Hybrid modes at photonic crystal heterostructure interfaces are observed, which are the results of superposition of existing modes in adjacent waveguides. The dispersion at the interfaces of a double hetero-structure waveguide tends to the dispersion of outer waveguides. The effective area still holding the dispersion of the middle waveguide is shorter than the geometrical length of the middle waveguide. The results of this study present a clear picture of dispersion at interfaces and the transmission in photonic crystal hetero-structures.
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Citation
Babak Dastmalchi, Reza Kheradmand, Abouzar Hamidipour, Abbas Mohtashami, Kurt Hingerl, and Javad Zarbakhsh, "Local Dispersion of Guiding Modes in Photonic Crystal Waveguide Interfaces and Hetero-Structures," Progress In Electromagnetics Research B, Vol. 26, 39-52, 2010.
doi:10.2528/PIERB10050104
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