title: Super Black Material from Low-Density Carbon Aerogels with Subwavelength Structures.
abstract: Many scientists have devoted themselves to the study of the interaction between subwavelength structures and electromagnetic waves. These structures are commonly composed of regular arrays of subwavelength protuberances, which can be artificially designed. However, extending from 2D periodic patterns to 3D disordered subwavelength structures has not been studied yet. In this study, we studied the total diffuse reflectivity of carbon aerogels with various 3D networks of randomly oriented particle-like nanostructures by using normally incident visible light (430-675 nm). We observed that the different 3D network nanostructures of carbon aerogels, especially for the structures with the minimum size, reduced the reflectivity effectively. It was found that the key mechanism for the subwavelength-structure-induced ultralow reflectivity property is due to the decrease of the amplitude of electron vibration forced by the electromagnetic wave, which provides a simple method for designing perfect black materials.
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Wei
authors: W
authors: Sun
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Ai
authors: A
authors: Du
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Yu
authors: Y
authors: Feng
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Jun
authors: J
authors: Shen
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Shangming
authors: S
authors: Huang
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Jun
authors: J
authors: Tang
authors: School of Physics Science and Engineering and ‡Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University , Shanghai 200092, China.
authors: Bin
authors: B
authors: Zhou
keywords: carbon aerogels; electron−microstructure interaction; low reflectivity; subwavelength