Design of broadband modulated one-dimensional photonic crystals based on porous silicon using evolutionary search

This work reports a methodology based on evolutionary search, through genetic algorithms, to design and optimize broadband modulated one-dimensional photonic crystals based on porous silicon in the visible spectral region. The photonic crystal structures consist of chirped layers that form a discret...

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Bibliographic Details
Published in:Optik (Stuttgart) 2022-06, Vol.260, p.169002, Article 169002
Main Authors: Ortiz-Vazquez, Eric, Lujan-Cabrera, I.A., Isaza, Cesar, Rizzo-Sierra, J.A., Ramirez-Gutierrez, C.F.
Format: Article
Language:English
Subjects:
Chirped mirror
Effective medium approximation
Genetic algorithm
Reflectance
Roughness
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Summary:This work reports a methodology based on evolutionary search, through genetic algorithms, to design and optimize broadband modulated one-dimensional photonic crystals based on porous silicon in the visible spectral region. The photonic crystal structures consist of chirped layers that form a discrete array of sub-mirrors with different resonance wavelengths. Three modulation functions: exponential, sine, and gaussian, were tested and optimized to maximize the reflectance intensity in a target region. The optical response simulation used the transfer matrix method and effective medium approximation for P, S, and non-polarized light to show the complete optical behavior for several incident angles. It was found that PhC designs with more than 90% reflectively with a total depth less than 6.1 μm and individual layers higher than 40 nm. Those value ranges can be helpful to improve the structure’s mechanical stability.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2022.169002