abstract

• We design, optimize, fabricate, and characterize highly reflective quasi-omnidirectional multilayered structures with a wide angular and spectral range. We consider chirped structures with layers of gradually varying thicknesses and structures made by stacking Bragg-type sub-structures, and we maximized their numerically calculated reflectance averaged over different spectral ranges keeping a minimum thickness for given pairs of refractive indices. We fabricated some of these structures with porous silicon with a low refractive contrast between adjacent layers, and compared their measured optical properties to the theoretical results and to previous works. We obtained relatively thin quasi-omnidirectional mirrors with wide bands over different wavelength ranges that compare favorably to others reported in the literature. © 2021 Elsevier B.V.

authors

• Agarwal V.
• Ariza Flores Augusto David
• Mochán W.L.

publication date

• 2021-01-01

funding provided via

• IN111119; Consejo Nacional de Ciencia y Tecnología, CONACYT: 256243, A-S1-30393; Universidad Michoacana de San Nicolás de Hidalgo, UMSNH  Grant

published in

• Optical Materials  Journal

keywords

• Chirped structures; Omnidirectional structures; Optimized reflectance; Stacked Bragg mirror structures

Digital Object Identifier (DOI)

• 10.1016/j.optmat.2021.111202

PubMed ID

start page

end page

volume

• 117

issue