Scholarlink

<p>Terahertz (THz) technology has been a major area of study in recent years for the detection of explosives and hidden weaponry. Royal Demolition Explosive (RDX) is an important component of the explosives used in terrorist assaults worldwide. Despite the fact that there have been several attempts to identify explosives, the bulk of the research is based on techniques which are laborious, time consuming, interactive, and hazardous or have detrimental properties. For the purpose of effectively detecting explosives, new non-destructive, non-contact, fast techniques are required. This work presents a safe, compact, and non-contact explosive detector based on THz Metamaterial Perfect Absorber (MPA). Each explosive has a unique spectrum for absorption. The RDX compound has a large absorption at 0.8 THz and three additional relatively modest absorptions at 1.05, 1.3 and 1.91&#xa0;THz. We have proposed copper-silicon based four individual frequencies selective THz metamaterial absorbers with two copper rings, a copper ground layer and a silicon dielectric spacer. The results indicate that the THz absorption maxima of around 100% achieved at 0.8, 1.05, 1.3, and 1.91 THz at normal incidence, similar to RDX four characteristic absorptions. Additionally, we could successfully incorporate absorbers for 0.8, 1.05, 1.3 THz into a single structure. All of these are perfect absorbers under normal incidence verified by perfect absorber theory as indicated by the values found for permittivity (<i>ε</i><sub><i>r</i></sub>), permeability (<i>µ</i><sub><i>r</i></sub>), reflection coefficient (<i>S</i><sub><i>11</i></sub>), and impedance (<i>Z</i><sub><i>11</i></sub>). Results are polarization insensitive. These THz absorbers have potential applications in the RDX detector.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Copper-silicon based THz metamaterial structure design for explosive detection

  • 期刊论文

  • 发表日期：

    2025年6月29日

查看全文
  • Shakti Sharma,
  • Updesh Sharma,
  • Akhilesh Pandey,
  • Shankar Dutta,
  • Manoj Kumar Khanna

摘要

Terahertz (THz) technology has been a major area of study in recent years for the detection of explosives and hidden weaponry. Royal Demolition Explosive (RDX) is an important component of the explosives used in terrorist assaults worldwide. Despite the fact that there have been several attempts to identify explosives, the bulk of the research is based on techniques which are laborious, time consuming, interactive, and hazardous or have detrimental properties. For the purpose of effectively detecting explosives, new non-destructive, non-contact, fast techniques are required. This work presents a safe, compact, and non-contact explosive detector based on THz Metamaterial Perfect Absorber (MPA). Each explosive has a unique spectrum for absorption. The RDX compound has a large absorption at 0.8 THz and three additional relatively modest absorptions at 1.05, 1.3 and 1.91 THz. We have proposed copper-silicon based four individual frequencies selective THz metamaterial absorbers with two copper rings, a copper ground layer and a silicon dielectric spacer. The results indicate that the THz absorption maxima of around 100% achieved at 0.8, 1.05, 1.3, and 1.91 THz at normal incidence, similar to RDX four characteristic absorptions. Additionally, we could successfully incorporate absorbers for 0.8, 1.05, 1.3 THz into a single structure. All of these are perfect absorbers under normal incidence verified by perfect absorber theory as indicated by the values found for permittivity (εr), permeability (µr), reflection coefficient (S11), and impedance (Z11). Results are polarization insensitive. These THz absorbers have potential applications in the RDX detector.