Study of local dispersion in photonic crystal waveguide interfaces and hetero-structures

Babak Dastmalchi; Reza Kheradmand; Mohammad R. A. Monazam; Abouzar Hamidipour; Abbas Mohtashami; Kurt Hingerl; Javad Zarbakhsh

doi:10.1117/12.780871

6 May 2008 Study of local dispersion in photonic crystal waveguide interfaces and hetero-structures

Babak Dastmalchi, Reza Kheradmand, Mohammad R. A. Monazam, Abouzar Hamidipour, Abbas Mohtashami, Kurt Hingerl, Javad Zarbakhsh

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Proceedings Volume 6989, Photonic Crystal Materials and Devices VIII; 698905 (2008) https://doi.org/10.1117/12.780871
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

We have recently introduced a novel method to calculate local dispersion relation based on the Finite-Difference Time-domain and filter diagonalization method, which is suitable for local study of dispersion in optical waveguide, especially for the cases of non-periodic, curvilinear, and finite waveguides. In this paper, this approach is applied to study the photonic crystal waveguides at interfaces and double hetero-structure waveguides. We also studied the stretching effect, which is increasing the lateral distance between neighboring rods along guiding direction on band gap. Hybrid modes at interface are results of superposition of existing modes in adjacent waveguides. The results present a clear picture of localization mechanism of cavity modes and the transmission in the double-hetero-structures.

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Babak Dastmalchi, Reza Kheradmand, Mohammad R. A. Monazam, Abouzar Hamidipour, Abbas Mohtashami, Kurt Hingerl, and Javad Zarbakhsh "Study of local dispersion in photonic crystal waveguide interfaces and hetero-structures", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 698905 (6 May 2008); https://doi.org/10.1117/12.780871

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KEYWORDS

Waveguides

Dispersion

Interfaces

Photonic crystals

Heterojunctions

Fused deposition modeling

Finite-difference time-domain method

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