Inspired by the multilayer structure of the cuticle of some gold beetles whose shell exhibits broadband reflection in the visible wavelength range, we numerically analyzed irregularly chirped dielectric mutilayers. The analysis was performed using a dedicated genetic algorithm which searches for the multilayer configurations that maximizes the reflection bandwidth. We found that the genetic algorithm leads to irregularly chirped structures which significantly outperform the regularly chirped ones proposed and analyzed in literature.
Francesco Chiadini, Vincenzo Fiumara, and Antonio Scaglione, "Design of bioinspired chirped reflectors using a genetic algorithm," Proc. SPIE 10162, Bioinspiration, Biomimetics, and Bioreplication 2017, 101620T (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 27, 2017; Published: 17 April 2017); https://doi.org/10.1117/12.2258584.
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