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<p>Terahertz (THz) waves play a crucial role in diverse applications, including telecommunications, medicine, and high-speed sensing and imaging. Despite their potential, THz waves can also contribute to unwanted electromagnetic pollution. This challenge has driven the development of devices capable of effectively shielding THz radiation while providing a certain degree of absorption. The development of absorbers marks a significant milestone in the rapid advancement of terahertz technology. Such absorbers have become essential in many fields, particularly in stealth applications. In designing these absorbers, special attention has been given to carbon-based materials, as they meet the requirements with an absorption coefficient of 10–100&#xa0;cm⁻¹ and a refractive index ranging from 3 to 5. Here, the graphene based THz absorber is designed and optimized. The proposed terahertz metamaterial-based absorber, after optimization, demonstrates a high absorption rate of nearly 98–100% within the frequency range of 2.4–4.2 THz, making it highly suitable for stealth applications.</p>

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Design and optimization of graphene-based terahertz absorber for stealth application

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • K. Sagadevan,
  • Elizabeth Caroline Britto,
  • Mohamed Nizar,
  • Sathish Kumar Danasegaran

摘要

Terahertz (THz) waves play a crucial role in diverse applications, including telecommunications, medicine, and high-speed sensing and imaging. Despite their potential, THz waves can also contribute to unwanted electromagnetic pollution. This challenge has driven the development of devices capable of effectively shielding THz radiation while providing a certain degree of absorption. The development of absorbers marks a significant milestone in the rapid advancement of terahertz technology. Such absorbers have become essential in many fields, particularly in stealth applications. In designing these absorbers, special attention has been given to carbon-based materials, as they meet the requirements with an absorption coefficient of 10–100 cm⁻¹ and a refractive index ranging from 3 to 5. Here, the graphene based THz absorber is designed and optimized. The proposed terahertz metamaterial-based absorber, after optimization, demonstrates a high absorption rate of nearly 98–100% within the frequency range of 2.4–4.2 THz, making it highly suitable for stealth applications.