Simulation of terahertz metamaterial absorbers with microbolometer structure

Jie Ding; Jun Wang; Xiaopei Guo; Yadong Jiang; Lin Fan

doi:10.1117/12.2068152

2 September 2014 Simulation of terahertz metamaterial absorbers with microbolometer structure

Jie Ding, Jun Wang, Xiaopei Guo, Yadong Jiang, Lin Fan

Proceedings Volume 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging; 92841E (2014) https://doi.org/10.1117/12.2068152
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

The metamaterial absorber in terahertz (THz) region, with the metal pattern layer/dielectric spacer/metal reflective layer sandwich structure, is characterized in this paper. The principle of metamaterial absorber absorbing terahertz wave was introduced firstly. The top layer of metamaterial absorber is a periodically patterned with metallic subwavelength structure, which also serves as an electric resonator. The bottom layer is a thick metal plane, which is used to reduce THz wave transmittance. The dielectric layer between two metallic layers results in magnetic resonance and the resonance depends on the thickness and dielectric constant of the dielectric layer. The absorption of metamaterial absorber to terahertz wave was simulated with CST software. The relationship between the size of the metamaterial structure and absorption frequency was analyzed with the simulation results. The results indicate that the absorption frequency is affected by the cell constant and geometric structure of top metal pattern, and absorption rate is related to both the thickness of dielectric layer and the size of resonator. In the end, the possibility of integrating the metamaterial absorber with micro-bridge structure to design room temperature terahertz detector was discussed, and the manufacturing process was introduced about room temperature terahertz detector with high THz wave absorption rate.

Citation Download Citation

Jie Ding, Jun Wang, Xiaopei Guo, Yadong Jiang, and Lin Fan "Simulation of terahertz metamaterial absorbers with microbolometer structure", Proc. SPIE 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging, 92841E (2 September 2014); https://doi.org/10.1117/12.2068152

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KEYWORDS

Absorption

Metamaterials

Terahertz radiation

Dielectrics

Millimeter wave sensors

Metals

Resonators

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