Open AccessDesign and optimization of an achromatic photonic crystal bend
Author(s) -
Jasmin Smajić,
Christian Hafner,
Daniel Erni
Publication year - 2003
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.11.001378
Subject(s) - photonic crystal , achromatic lens , optics , sensitivity (control systems) , reflection (computer programming) , materials science , photonics , total internal reflection , photonic integrated circuit , power (physics) , optoelectronics , physics , electronic engineering , computer science , quantum mechanics , programming language , engineering
We perform a simple sensitivity analysis of a W1 waveguide bend in a photonic crystal (PhC) where we use the information obtained to optimize the PhC bend's frequency response. Within a single optimization step we already achieve very low power reflection coefficients over almost the entire frequency range of the photonic bandgap (PBG), i.e., an achromatic bend. A further analysis shows that there is a single critical rod in the optimized bend structure that exhibits an extraordinary high sensitivity at a given frequency. Hence power reflection becomes tunable from 0 % up to 100 % involving only small changes in the critical rod's properties. This opens the door to novel topologies for compact switches and sensor applications.