• 文献标题:   Coordinated Tuning of Graphene's Chemica Potential With NIR Wavelength and Temperature Under Kubo Framework for Enhanced Performance of SPR-Based Chemical Sensor
  • 文献类型:   Article
  • 作  者:   SHARMA AK, DOMINIC A
  • 作者关键词:   graphene, plasmon, sensor, doping, infrared, temperature
  • 出版物名称:   IEEE SENSORS JOURNAL
  • ISSN:   1530-437X EI 1558-1748
  • 通讯作者地址:   Natl Inst Technol Delhi
  • 被引频次:   0
  • DOI:   10.1109/JSEN.2018.2870743
  • 出版年:   2018

▎ 摘  要

The performance of a Kretschmann configuration-based surface plasmon resonance sensor with fluoride glass prism, Ag layer, and graphene monolayer is simulated and analyzed under the coordinated tuning of temperature (293-373 K), near infrared (NIR) wavelength (1310-1700 nm), and graphene's chemical potential (0-1 eV). The simulation is carried out by considering the graphene's conductivity variations with wavelength, temperature, and chemical potential (As per Kubo formulation). For Ag layer, the phenomena of phononelectron scattering and electron-electron scattering are taken into account. Thermo-optic effect in dielectric media (ZBLAN prism and analyte samples, i.e., methanol and ethanol) is also considered. The simulation results indicate that a combination of shorter MR wavelength, higher temperature, and larger chemical potential can provide considerably enhanced performance. A deeper analysis predicts that 1310 nm wavelength, greater than 0.6 eV chemical potential, and 325-330 K temperature can he used as a pragmatic combination in order to achieve significantly enhanced sensing performance.