Title : ( Improved photonic crystal directional coupler with short length )
Authors: Malihe Khatibi Moghadam , Amir Reza Attari , Mir Mojtaba Mirsalehi ,
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Abstract
We investigate a photonic crystal waveguide coupler which is formed by two closely-spaced linear waveguides in a two-dimensional triangular lattice of air holes. Our study show that shifting one row of the air holes between the waveguides affects the dispersion curves of the guided modes and if the triangular lattice of air holes between the waveguides is replaced by a rectangular lattice, this modification results in an ultra-short coupling structure with coupling length less than 3a, where a is the lattice constant. Also, we investigate the effect of changing the radii of air holes that are adjacent to or between the waveguides on the coupling length and show that increasing the radius of air holes between the waveguides decreases the coupling length. We analyze the output spectrum of an ultra-short channel drop filter designed based on this structure.
Keywords
, Photonic Crystal (PC); Photonic Band Gap (PBG); Plane Wave Expansion (PWE) method, Waveguide, Directional Coupler.
@article{paperid:1015073,
author = {Khatibi Moghadam, Malihe and Attari, Amir Reza and Mirsalehi, Mir Mojtaba},
title = {Improved photonic crystal directional coupler with short length},
journal = {Photonics and Nanostructures-Fundamentals and Applications},
year = {2010},
volume = {8},
number = {1},
month = {January},
issn = {1569-4410},
pages = {47--53},
numpages = {6},
keywords = {Photonic Crystal (PC); Photonic Band Gap (PBG); Plane Wave Expansion (PWE) method; Waveguide; Directional Coupler.},
}
%0 Journal Article
%T Improved photonic crystal directional coupler with short length
%A Khatibi Moghadam, Malihe
%A Attari, Amir Reza
%A Mirsalehi, Mir Mojtaba
%J Photonics and Nanostructures-Fundamentals and Applications
%@ 1569-4410
%D 2010
