Facile fabrication of encryption composite materials with trilayer quasi-amorphous heterostructure

Encriptación de información mediante procesamiento óptico

“…Se debe destacar que estas contribuciones dieron lugar al inicio de una línea de investigación en encriptación óptica de información empleando contenedores de información, la cual ha generado aportes respaldados por sistemas experimentales coherentes ( Barrera-Ramírez, et al, 2014b;Jaramillo, et al, 2018;Trejos, et al, 2015) e incoherentes (Cheremkhin, et al, 2017;Cheremkhin, et al, 2021a;Evtikhiev, et al, 2020;Wang, et al, 2020;), y sistemas ópticos-virtuales (Lin, et al, 2015;Sui, et al, 2017). Además, motivaron el surgimiento de nuevas líneas de investigación y desarrollo en torno al procesamiento óptico usando contenedores en procesos de autenticación de información (Blau, et al, 2020;Carnicer, et al, 2015;Chen, et al, 2018;Qin, et al, 2018a) y a la implementación de diferentes técnicas y materiales para la fabricación de contenedores (Li, et al, 2017c;Meng, et al, 2021a;Petriashvili, et al, 2018;Ponjavidze, et al, 2018;Wang, et al, 2021). También incentivaron el desarrollo de aplicaciones en diferentes tópicos y áreas, por ejemplo, para la formación integral de imágenes (Markman, et al, 2014), la protección de hologramas con marcas de agua (Li, et al, 2018), la pictografía (Zhu, et al, 2019), y la esteganografía (Alajmi, et al, 2020).…”

Synthesis of Dielectric Nanospheres with Moderate‐Refractive‐Index and Applications in Photon Manipulating

“…For example, Meng et al prepared an anti-counterfeiting structure consisting of three quasiamorphous nanostructure layers (as shown in Figure 12a-b). [124] The disordered photonic glass structure composed of PS nanospheres and carbon black played the shielding layer with switchable transmittance. The CdS information layer is patterned by mask-assisted spraying method.…”

“…Finally, a disordered CdS layer with only intrinsically yellow was added to the multilayer structure, and a double-sided label with different encryption patterns was fabricated, as shown in Figure 13. [124] (d-e) Schematic illustration of the inkjet printing process of CdS invisible photonic pattern on paper-based substrates for anticounterfeiting applications. [127] (f) The reflection spectrum and photograph (inset) of the front (left) and back (right) sides of the film built by spray-coating 200 nm single-crystal Cu 2 O spheres (g) Photographs of the front and back of butterfly pattern using single crystal Cu 2 O spheres with 200 nm and 240 nm diameters.…”

“…(f) The reflection spectrum and photograph (inset) of the front (left) and back (right) sides of the film built by spray-coating 200 nm single-crystal Cu 2 O spheres (g) Photographs of the front and back of butterfly pattern using single crystal Cu 2 O spheres with 200 nm and 240 nm diameters [125]. Figures a-c were reproduced from Ref [124]. Copyright (2021), with permission from Springer Nature.Figures d-ewere reproduced from Ref [127].…”

Robust Large-Sized Photochromic Photonic Crystal Film for Smart Decoration and Anti-Counterfeiting

“…Due to their well-ordered structures composed of periodic arrangement of materials with different dielectric constants or refractive indexes, − photonic band gap (PBG) , can be formed to diffract specific visible wavelengths according to the combination of Snell and Bragg formula ( m λ = 2 d ( n eff 2 – sin 2 θ) 1/2 ). , The lattice spacing ( d ), effective refractive index ( n eff ) and light incident angle (θ), also referred as the observation angle, can be tuned under different external conditions (heat, − force, − magnetism, − etc. − ), producing the variation of the diffracted wavelengths. Therefore, more and more functional PC materials, in recent years, have been developed in the fields of sensors, , E-skin, , anticounterfeiting, , information encryption, display, coating, and so on. − …”