Wide-band terahertz absorbing structure with graphene based on dual-scale four separation layers optimization

TAN Ligang;LUO Mingwei;LI Jie

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    Published By: Journal of Applied Optics

    CN 61-1171/O4

Journal of Applied Optics ›› 2023, Vol. 44 ›› Issue (1) : 6-16. DOI: 10.5768/JAO202344.0101002

Wide-band terahertz absorbing structure with graphene based on dual-scale four separation layers optimization

  • TAN Ligang1, LUO Mingwei1, LI Jie1
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Abstract

To realize high-efficiency countermeasures and stealth for future remote terahertz radar, a wide-band terahertz absorbing structure with graphene was designed for typical operating frequencies of terahertz radar. The basic absorbing structure unit of wide-band absorbing structure was the surface metal layer/graphene layer/dielectric layer/bottom metal layer, and the dual-scale four separation layers were designed and optimized to certain the structure parameters of each layer using the genetic algorithm. Simulation results show that the absorption efficiency of wide-band absorbing structure is better than 80% in the frequency range of 0.138 THz~2 THz, 97.46% in the frequency range of 0.157 THz~2 THz, and 92.27% at the typical terahertz radar operating frequency, which satisfy the demands of countermeasures and stealth for terahertz radars.

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terahertz radar / graphene / wide-band absorption / stealth countermeasure

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TAN Ligang, LUO Mingwei, LI Jie. Wide-band terahertz absorbing structure with graphene based on dual-scale four separation layers optimization. Journal of Applied Optics. 2023, 44(1): 6-16 https://doi.org/10.5768/JAO202344.0101002

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