Share Email Print

Optical Engineering

Bioinspired irregularly chirped broadband reflecting multilayers
Author(s): Francesco Chiadini; Vincenzo Fiumara; Antonio Scaglione
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

Dielectric multilayers consisting of alternating layers of two different materials with thicknesses irregularly decreasing with depth in the structure are included in the cuticle of some beetles whose shell exhibits broadband reflection in the optical wavelength range. Emulating these structures, we propose and numerically analyze irregularly chirped dielectric multilayers. Analysis was performed using a dedicated genetic algorithm (GA) that searches for the multilayer configurations maximizing the reflection for normal incidence over a large wavelength range. We found that the GA leads to the irregularly chirped reflectors that significantly outperform the regularly chirped ones proposed and analyzed in the literature.

Paper Details

Date Published: 19 August 2017
PDF: 6 pages
Opt. Eng. 56(8) 085102 doi: 10.1117/1.OE.56.8.085102
Published in: Optical Engineering Volume 56, Issue 8
Show Author Affiliations
Francesco Chiadini, Univ. degli Studi di Salerno (Italy)
Vincenzo Fiumara, Univ. degli Studi della Basilicata (Italy)
Antonio Scaglione, Univ. degli Studi di Salerno (Italy)

© SPIE. Terms of Use
Back to Top