Abstract
In this paper, a high-efficiency 60° photonic crystal (PC) bend geometry is proposed. The corresponding PC is a two-dimensional triangular lattice of air holes in a dielectric slab. In the proposed bend structure, five additional holes are introduced in the bend. The radii of these holes are changed gradually. Hence the effect of bend discontinuity is decreased and consequently, a wide-band high efficiency bend is obtained. In this structure, the frequency bandwidth for which the transmission coefficient is greater than 0.9 covers 84% of the single-mode bandwidth of the waveguide, while for the best geometry reported in the literature this value does not exceed 56%. For numerical analysis of waveguide bends, the slab PC structure is first replaced by a two-dimensional (2D) PC with an effective refractive index and then, a 2D FDTD method is used to obtain the transmission coefficient of the bend.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Photonics and Nanostructures - Fundamentals and Applications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
