Chapter 3 Terahertz metamaterial absorber sensor development for hazardous gas sensing
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Mohammad Rashed Iqbal Faruque
Abstract
This work presents the design and evaluation of a novel terahertz (THz) metamaterial absorber sensor constructed from silver on a quartz substrate. The proposed sensor, operating in the THz frequency range, exhibits high sensitivity, efficiency, and nondestructive sensing capabilities, leveraging the unique properties of THz waves. The design achieves an ultra-thin absorption peak with a narrow bandwidth and an absorption rate of 99.75%, resulting in a high-quality factor of 1,075.24. The sensor’s polarization insensitivity was confirmed through performance assessments at various polarization angles, showing consistent absorption rates. Furthermore, the sensor demonstrated exceptional refractive index sensing capabilities, with a sensitivity of 1.4 THz/RIU and a figure of merit (FoM) of 222. The performance was evaluated for detecting hazardous gases such as hydrogen sulfide (H2S), where significant lateral shifts in absorption peaks were observed for minor refractive index changes, indicating a high sensitivity. The proposed design’s effectiveness as a reliable refractive index sensor is underscored by its ability to detect small variations in the surrounding dielectric environment, making it suitable for applications in environmental monitoring and industrial safety. The study emphasizes the practical feasibility of integrating THz metamaterial sensors into various applications, addressing the technological gap with artificial materials capable of operating at THz frequencies. The results demonstrate the potential of the proposed sensor to enhance detection technologies, providing high-sensitivity, efficient, and sensing solutions for real-world applications.
Abstract
This work presents the design and evaluation of a novel terahertz (THz) metamaterial absorber sensor constructed from silver on a quartz substrate. The proposed sensor, operating in the THz frequency range, exhibits high sensitivity, efficiency, and nondestructive sensing capabilities, leveraging the unique properties of THz waves. The design achieves an ultra-thin absorption peak with a narrow bandwidth and an absorption rate of 99.75%, resulting in a high-quality factor of 1,075.24. The sensor’s polarization insensitivity was confirmed through performance assessments at various polarization angles, showing consistent absorption rates. Furthermore, the sensor demonstrated exceptional refractive index sensing capabilities, with a sensitivity of 1.4 THz/RIU and a figure of merit (FoM) of 222. The performance was evaluated for detecting hazardous gases such as hydrogen sulfide (H2S), where significant lateral shifts in absorption peaks were observed for minor refractive index changes, indicating a high sensitivity. The proposed design’s effectiveness as a reliable refractive index sensor is underscored by its ability to detect small variations in the surrounding dielectric environment, making it suitable for applications in environmental monitoring and industrial safety. The study emphasizes the practical feasibility of integrating THz metamaterial sensors into various applications, addressing the technological gap with artificial materials capable of operating at THz frequencies. The results demonstrate the potential of the proposed sensor to enhance detection technologies, providing high-sensitivity, efficient, and sensing solutions for real-world applications.
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Chapter 1 Concept and property of metamaterial 1
- Chapter 2 Metamaterials and metasurfaces on the purpose of SAR reduction techniques and analysis 41
- Chapter 3 Terahertz metamaterial absorber sensor development for hazardous gas sensing 81
- Chapter 4 Application of metamaterials in radiation protection 103
- Chapter 5 Medical application of metamaterials 149
- Chapter 6 Metamaterial absorbers: from theory to practical implementation 165
- Chapter 7 Coding metamaterials: RCS reduction and EMI shielding considerations 187
- Chapter 8 Metamaterial incorporated microstrip-based sensor for dielectric material characterisation 207
- Index 239
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Chapter 1 Concept and property of metamaterial 1
- Chapter 2 Metamaterials and metasurfaces on the purpose of SAR reduction techniques and analysis 41
- Chapter 3 Terahertz metamaterial absorber sensor development for hazardous gas sensing 81
- Chapter 4 Application of metamaterials in radiation protection 103
- Chapter 5 Medical application of metamaterials 149
- Chapter 6 Metamaterial absorbers: from theory to practical implementation 165
- Chapter 7 Coding metamaterials: RCS reduction and EMI shielding considerations 187
- Chapter 8 Metamaterial incorporated microstrip-based sensor for dielectric material characterisation 207
- Index 239
