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<p>Urgently, low-frequency (C-X band) electromagnetic absorption has emerged research hotspot along with 5G communication advancements and escalating military stealth demands. Single optimization strategies for cross-band systems face significant challenges. Particularly, the dispersion characteristics of dielectric constants exhibit marked variations across bands. Inspired by the skin’s "dermal-epidermal" thermoregulation system, we designed a "dermal-epidermal" binary interface to synergistically regulate cross-band electromagnetic impedance matching. Typically, "Dermis" interface polarization can effectively tune C-band impedance. And "Epidermis" designed plasmonics effectively tune X-band absorption intensity. By leveraging such binary synergy, the "dermal-epidermal" configuration achieved full X-band coverage and 2.48&#xa0;GHz at the C-band (1.60 wt.%). And plasmonic-induced exchange resonance exhibits a distinct resonance peak in the X-band. This resonance peak plays a crucial role in reducing reflection loss (RL) and in increasing the effective absorption bandwidth (EAB). This work establishes a novel biomimetic configuration for lightweight, tunable low-frequency absorbers, advancing broadband electromagnetic material design.</p>

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Biomimetic binary interface engineering for ultra-light tunable low-frequency electromagnetic absorbers

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月22日

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  • Zhuoyang Li,
  • Chunyan Ding,
  • Shanshan Fan,
  • Zhengliang Qiu,
  • Xue Guo,
  • Songsong Wu,
  • Yanan Liu,
  • Bo Zhong,
  • Long Xia,
  • Guangwu Wen,
  • Xiaoxiao Huang

摘要

Urgently, low-frequency (C-X band) electromagnetic absorption has emerged research hotspot along with 5G communication advancements and escalating military stealth demands. Single optimization strategies for cross-band systems face significant challenges. Particularly, the dispersion characteristics of dielectric constants exhibit marked variations across bands. Inspired by the skin’s "dermal-epidermal" thermoregulation system, we designed a "dermal-epidermal" binary interface to synergistically regulate cross-band electromagnetic impedance matching. Typically, "Dermis" interface polarization can effectively tune C-band impedance. And "Epidermis" designed plasmonics effectively tune X-band absorption intensity. By leveraging such binary synergy, the "dermal-epidermal" configuration achieved full X-band coverage and 2.48 GHz at the C-band (1.60 wt.%). And plasmonic-induced exchange resonance exhibits a distinct resonance peak in the X-band. This resonance peak plays a crucial role in reducing reflection loss (RL) and in increasing the effective absorption bandwidth (EAB). This work establishes a novel biomimetic configuration for lightweight, tunable low-frequency absorbers, advancing broadband electromagnetic material design.