Ultra-Sensitive Radio Frequency Biosensor at an Exceptional Point of Degeneracy Induced by Time Modulation

@article{Kazemi2021UltraSensitiveRF,
  title={Ultra-Sensitive Radio Frequency Biosensor at an Exceptional Point of Degeneracy Induced by Time Modulation},
  author={Hamidreza Kazemi and Amirhossein Hajiaghajani and Mohamed Y. Nada and Manik Dautta and Muhannad Alshetaiwi and Peter Tseng and Filippo Capolino},
  journal={IEEE Sensors Journal},
  year={2021},
  volume={21},
  pages={7250-7259}
}
We exploit the premises of exceptional points of degeneracy (EPDs) induced in linear time-periodic (LTP) systems to achieve extremely sensitive biosensors. The EPD is formed in a single LC resonator where the total capacitance is comprised of a time-varying capacitor in parallel to a biosensing capacitor. We use the time-periodic variation of a system parameter (e.g., capacitance) to achieve a second order EPD aiming at improving the sensitivity of liquid based radio frequency biosensors… 

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