Ultrasensitive Exceptional Point Circuit for Enhanced Physiological Sensing

Exceptional points (EPs) are degeneracies in non-Hermitian systems that have emerged as a new way to tailor the system response. Biasing systems at EPs, in particular, has recently been shown to enhance the sensitivity of certain resonant sensors. Here we demonstrate an EP circuit that enables ultra...

Full description

Saved in:
Bibliographic Details
Published in2019 Thirteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) pp. X-110 - X-112
Main Authors Dong, Z., Ho, J. S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2019
Subjects
Monitoring
Resonant frequency
Resonators
Sensitivity
Sensors
Wireless communication
Wireless sensor networks
Online AccessGet full text

Cover

More Information
Summary:Exceptional points (EPs) are degeneracies in non-Hermitian systems that have emerged as a new way to tailor the system response. Biasing systems at EPs, in particular, has recently been shown to enhance the sensitivity of certain resonant sensors. Here we demonstrate an EP circuit that enables ultrasensitive readout of wireless physiological health sensors based on LC circuits. We show that this circuit can be automatically operated at an EP and exhibit an amplified response to a small perturbation. In vivo experiments show that enhanced sensitivity can be maintained in dynamic living environments for monitoring of respiratory motion.
DOI:10.1109/MetaMaterials.2019.8900934