Comparative research on characteristics of light absorbers of metal-dielectric and metal photonic crystal transmission grating

Zhu, Shalu; Chen, Liang; Zhang, Shuqin; He, Minyou; Yin, Lei; Qian, Yuwen

doi:10.1016/j.ijleo.2017.12.105

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…Thus, the absorbance was higher than 90% through the whole visible wavelength range. The extremely high absorbance obtained with Pistia stratiotes and Phanera purpurea leaves are comparable with other absorbers 16,17,[19][20][21] . Therefore, it is possible to conclude that the copper-coated Phanera purpurea and Pistia stratiotes leaves are good candidates for being applied as the light absorbers in the visible, near infrared, and infrared wavelength regions.…”

Section: Resultssupporting

confidence: 76%

Bio-inspired broadband absorbers induced by copper nanostructures on natural leaves

Dao

Pham

Nguyen

et al. 2020

Sci Rep

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& tien thanh pham 1* in this work, two copper-based biometamaterials were engineered using leaves of water cabbage (Pistia stratiotes) and purple bauhinia (Phanera purpurea) as templates. the copper sputtering was implemented to produce a thin copper film on the surface of leaves. The scanning electron microscopy (SeM) images exhibited the root hair-like nanostructure of water cabbage leaf and single comb-like nanostructure of purple bauhinia leaf. in spite of copper coating, the leaf surfaces of water cabbage and purple bauhinia were black and exhibited excellent light absorption at visible and near infrarrred wavelengths. It was estimated that these two types of leaves could absorb roughly 90% of light. Finite-difference time-domain (FDTD) calculations predicted the low reflectance stemming from the leaf nanostructures and copper coating layer. Because of the low cost of copper as a coating metal and simple procedure, this can be a promising method for quick fabrication of a thin copper film on the leaf nanostructure for application in blackbody or as the light absorbers.

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