Tunable mid-infrared refractive index sensor with high angular sensitivity and ultra-high figure-of-merit based on Dirac semimetal
| Autor: | Jianxing Ouyang, Jiao Tang, Yunyang Ye, Minzhu Xie |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Field (physics) General Physics and Astronomy Physics::Optics 02 engineering and technology 01 natural sciences Optical Tamm states 0103 physical sciences Figure of merit Sensitivity (control systems) Mid-infrared Photonic crystal Sensor 010302 applied physics business.industry Fermi energy 021001 nanoscience & nanotechnology Semimetal lcsh:QC1-999 Dirac semimetal Figure-of-merit Excited state Optoelectronics Angular sensitivity 0210 nano-technology business Refractive index lcsh:Physics |
| Zdroj: | Results in Physics, Vol 17, Iss, Pp 103035-(2020) |
| ISSN: | 2211-3797 |
| Popis: | A tunable mid-infrared refractive index sensor consisting of bulk-Dirac-semimetal (BDS) and one-dimensional photonic crystals (1DPC) is proposed. This sensor has high angular sensitivity and ultra-high figure-of-merit (FOM), which is attributed to the optical Tamm states excited at the interfaces between BDS and 1DPC. Our numerical simulations show that the maximum value of the angular sensitivity and FOM of the sensor can reach up to 711.8°/RIU and 6001 RIU−1 respectively, which are much higher than those of the reported similar sensors. The simulations also demonstrate that the sensing performance can be adjusted by the Fermi energy and the structural parameters of the sensor. It is believed that, with the simple structure and the excellent performance, the proposed sensor has a broad application prospect in the field of biological detection. |
| Databáze: | OpenAIRE |
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