Nath Uddipan, Banerjee Sagnik, Santini Carlo, Citroni Rocco, Mangini Fabio, Frezza Fabrizio
ICT and Internet Engineering, Department of Electronics Engineering, University of Rome "Tor Vergata", 00133 Rome, Italy.
Department of Information Engineering, Electronics and Telecommunications (DIET), Sapienza University of Rome, 00184 Rome, Italy.
Sensors (Basel). 2025 Jun 11;25(12):3660. doi: 10.3390/s25123660.
This study presents a cost-effective Hybrid Metamaterial Absorber (HMA) featuring a simple circular-patterned cylindrical design, comprising an indium antimonide (InSb) resonator on a thin copper sheet. Through numerical simulations, we demonstrate that the structure exhibits temperature-tunable properties and refractive index sensitivity. At 300 K (refractive index = 1), a peak absorption of 99.94% is achieved at 1.797 THz. Efficient operation is observed across a 40 K temperature range and a refractive index spectrum of 1.00-1.05, relevant for thermal imaging and spatial bio-sensing. The simulated temperature sensing sensitivity is 13.07 GHz/K, and the refractive index sensitivity is 1146 GHz/RIU. Parametric analyses reveal tunable absorption through adjustments of the InSb resonator design parameters. Owing to its high efficiency and sensitivity demonstrated in simulations, this HMA shows promise for sensing applications in biotechnology, semiconductor fabrication, and energy harvesting.
本研究提出了一种具有成本效益的混合超材料吸收器（HMA），其具有简单的圆形图案圆柱形设计，由薄铜板上的锑化铟（InSb）谐振器组成。通过数值模拟，我们证明了该结构具有温度可调特性和折射率敏感性。在300 K（折射率 = 1）时，在1.797太赫兹处实现了99.94%的峰值吸收。在40 K的温度范围内以及1.00 - 1.05的折射率光谱范围内观察到了高效运行，这与热成像和空间生物传感相关。模拟的温度传感灵敏度为13.07 GHz/K，折射率灵敏度为1146 GHz/RIU。参数分析表明，通过调整InSb谐振器的设计参数可以实现可调吸收。由于其在模拟中表现出的高效率和灵敏度，这种HMA在生物技术、半导体制造和能量收集的传感应用中显示出前景。
