Issues when designing hypoellipse photonic crystal waveguides |
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| Institution: | 1. School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia;2. Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia;3. Centre for Biomedical Technology, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia;4. Griffith Institute for Drug Discovery (GRIDD), Griffith University, QLD, Australia;5. Menzies Health Institute Queensland (MIHQ), Griffith University, QLD, Australia |
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| Abstract: | This work designs a type of line-defect photonic crystal waveguide (PCW) called hypoellipse PCW (HPCW) that considers two conflicting issues: group index and bandwidth. To do so, the recent multi objective framework called MoMIR is employed. A wide range of designs obtained demonstrates the advantage of considering group index and bandwidth simultaneously when designing HPCWs. Comparison of the proposed HPCW with the current best PCWs shows a nearly 7% improvement over the latter in terms of normalized delay-bandwidth product (NDBP). Analysis of the results reveals some of the physical rules about the structure of the HPCW. Finally, optical pulse propagation in obtained HPCWs and the process of designing an optical buffer by using an obtained design are explained. |
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| Keywords: | Photonic crystal PCW Slow light Hypoellipse photonic crystal waveguides |
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