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Design and fabrication of energy-absorbing device based on biomimetic gradient microstructure

JINSHUAI LU1, YABING FENG2, SHANYAN HUANG2, GANGXIANG XU3, TIANQI ZHAO2, PENGWEI ZHOU2, YING TIAN2,*

Affiliation

  1. College of Aeronautics, Zhejiang Institute of Communications, Hangzhou 311112, China
  2. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China
  3. Training and Equipment Management Department, Hangzhou Vocational and Technical University, Hangzhou 310018, China

Abstract

An inverted pyramid microstructure with enhanced absorption characteristics in the visible and near-infrared bands was proposed, with the absorption rate increased by 20%. The influences of the shape, aspect ratio, array period and incident angle of the inverted pyramid on the absorption characteristics were analyzed. In the infrared band, a cube cavity microstructure combined with a metal film was proposed, which significantly improved the absorption rate in the range of 900-1700 nm. An average broadband absorption performance of 80% was achieved in the 1250-1550 nm band. In the terahertz band, a pure silicon dielectric inverted pyramid metasurface was designed. This enhanced absorption microstructure was fabricated based on wet etching method. Experimental demonstrated that the average absorption rate reached 70% in the 0.6-1.0 THz band, and it also featured polarization insensitivity and tunability..

Keywords

Metasurface, Absorber.

Submitted at: Feb. 8, 2026
Accepted at: Oct. 5, 2026

Citation

JINSHUAI LU, YABING FENG, SHANYAN HUANG, GANGXIANG XU, TIANQI ZHAO, PENGWEI ZHOU, YING TIAN, Design and fabrication of energy-absorbing device based on biomimetic gradient microstructure, Journal of Optoelectronics and Advanced Materials Vol. 28, Iss. 9-10, pp. 412-425 (2026)