Abstract
In this paper, one of the most recently introduced phenomena in Photonic Crystal structures was investigated to design self-collimation based waveguides. The advantages of using self-collimation property to design waveguides are discussed and the idea is thoroughly compared with conventional band gap engineered waveguides made by defects. The 2D square lattice waveguides presented in this article, guide the 1.55μm wavelength, most commonly used in telecommunication applications. Results indicate the high coupling efficiency enhancement in Self-Collimation based waveguides due to using low index contrast materials. The simulations are done using Plane Wave Expansion (PWE) and Finite Difference Time Domain (FDTD) methods and results confirm the value of using self-collimation phenomena in waveguide design.
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