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Terahertz absorption of pigment-enhanced insulating composites

Hongliang tangCollege of Smart Materials and Future Energy, Fudan University, Shanghai, 200433, ChinaLonglong XueZhejiang Key Laboratory of Extreme Environment Functional Materials, Yiwu Research Institute of Fudan University, Yiwu City, Zhejiang, 322000, ChinaTingting ZhouCollege of Smart Materials and Future Energy, Fudan University, Shanghai, 200433, ChinaН. Р. ВохидоваInstitute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, 100128, UzbekistanYinxiang LuZhejiang Key Laboratory of Extreme Environment Functional Materials, Yiwu Research Institute of Fudan University, Yiwu City, Zhejiang, 322000, China

2026en

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ABI

Annotatsiya

With the advancement of 6G technology, the development of broadband absorbing materials that are effective in both the terahertz (THz) and gigahertz (GHz) bands is crucial for modern electronic packaging and electromagnetic protection. This paper proposes an innovative method for the first time, where organic dyes containing multi-polar functional groups and copper powder are co-doped into an epoxy resin matrix to fabricate insulating composite thin films with excellent THz absorption properties. With a thickness of 1 mm, the EP-25%Acid Black-Cu film achieves an average reflection loss (RL) of −15.6 dB and an effective absorption bandwidth of 2.2 THz, representing a 35.4% improvement in absorption performance compared to pristine epoxy. Simultaneously, its electromagnetic interference (EMI) shielding effectiveness reaches 50 dB, enabling the integration of wave absorption and shielding functionalities.

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Identifikatorlar

DOI: 10.1016/j.matchemphys.2026.133170

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