Abstract
We explore an efficient method to couple light from a dielectric medium into a two-dimensional photonic-crystal waveguide (PCW). This is achieved by inserting a graded-index photonic crystal (PC) between a dielectric waveguide and a conventional PCW obtained by removing one row of air holes along the TK direction in a triangular-lattice PC. Effective mode transformation is achieved with a spot-size conversion ratio of 12:1. The low transmission efficiency (30%) that occurs in a direct coupling from dielectric waveguide into the PCW is raised to ~80% (0.98 dB) over a broad frequency range. Further improvements for nearly perfect transmission appear to be feasible.
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 callDisclaimer: 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.
