A terahertz metamaterial sensor with high-sensitivity based on electromagnetically induced transparency effect

In this study, we design an electromagnetically induced transparency (EIT) effect based on a metamaterial sensor composed of three split-ring structures in the terahertz range. The EIT transparency window appears at 1.83 THz due to the electromagnetic coupling between the three split-rings. To analyze its physical mechanism, we use the ‘two-particle’ model and obtain good consistency between the simulation and theoretical results. The simulation results also show that when the thickness of the measured object is 15 μm and the refractive index is between 1 and 1.5, the refractive index sensitivity of the sensor is as high as 423.9 GHz RIU−1, and the figure of merit value is 6.9. In addition, the sensor is used to simulate the detection and distinction of different types of microbiota. We expect that this work will pave the way for designing high-sensitivity EIT sensors in the terahertz region and promote the development of terahertz sensing and label-free detection of pathogens.

[1]  R. Averitt,et al.  Broadband Terahertz Silicon Membrane Metasurface Absorber , 2022, ACS Photonics.

[2]  L. Dong,et al.  Electromagnetically induced transparency metamaterials: theories, designs and applications , 2022, Journal of Physics D: Applied Physics.

[3]  Yu‐Sheng Lin,et al.  Tunable Terahertz Metamaterial with Electromagnetically Induced Transparency Characteristic for Sensing Application , 2021, Nanomaterials.

[4]  Lihua Xiao,et al.  A compact graphene metamaterial based on electromagnetically induced transparency effect , 2020 .

[5]  Zhongxiang Zhou,et al.  Ultrahigh-Q and Polarization-Independent Terahertz Metamaterial Perfect Absorber , 2020, Plasmonics.

[6]  Dan Liu,et al.  Staggered H-shaped metamaterial based on electromagnetically induced transparency effect and its refractive index sensing performance , 2019, Optics Communications.

[7]  Lei Lin,et al.  All-Dielectric Terahertz Plasmonic Metamaterial Absorbers and High-Sensitivity Sensing , 2019, ACS omega.

[8]  Yong Ma,et al.  A terahertz metamaterial based on electromagnetically induced transparency effect and its sensing performance , 2019, Optics Communications.

[9]  Hao Jiang,et al.  All-dielectric metasurface-based roll-angle sensor , 2018, Sensors and Actuators A: Physical.

[10]  Kun Ren,et al.  Self-Reference Refractive Index Sensor Based on Independently Controlled Double Resonances in Side-Coupled U-Shaped Resonators , 2018, Sensors.

[11]  Xiaoshun Jiang,et al.  Optomechanically tuned electromagnetically induced transparency-like effect in coupled optical microcavities , 2016 .

[12]  Qun Wu,et al.  Magnetic metamaterial analog of electromagnetically induced transparency and absorption , 2015 .

[13]  S. J. Park,et al.  Detection of microorganisms using terahertz metamaterials , 2014, Scientific Reports.

[14]  Xueqin Huang,et al.  Super imaging with a plasmonic metamaterial: Role of aperture shape , 2011 .

[15]  Qiang Lin,et al.  Supplementary Information for “ Electromagnetically Induced Transparency and Slow Light with Optomechanics ” , 2011 .

[16]  David R. Smith,et al.  Metamaterial Electromagnetic Cloak at Microwave Frequencies , 2006, Science.

[17]  内蒙古大学.  Research on Sensing Characteristics of Dual Band Terahertz Metamaterial Absorber Sensor , 2021 .

[18]  S. Y. Lee,et al.  Optical Biosensors for the Detection of Pathogenic Microorganisms. , 2016, Trends in biotechnology.

[19]  Willie J. Padilla,et al.  Dynamic electromagnetic metamaterials , 2015 .