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Title: | NON-HERMITIAN ELECTRONICS FOR WIRELESS BIOMEDICAL SENSING | Authors: | DONG ZHENYA | ORCID iD: | orcid.org/0000-0001-6687-3005 | Keywords: | Health monitoring, non-Hermitian physics, wireless interrogation, biomedical sensing, exceptional point, Fano resonance | Issue Date: | 27-Jul-2020 | Citation: | DONG ZHENYA (2020-07-27). NON-HERMITIAN ELECTRONICS FOR WIRELESS BIOMEDICAL SENSING. ScholarBank@NUS Repository. | Abstract: | Wireless technologies for continuous physiological sensing are essential for health monitoring. In particular, resonant electronic circuits represent an important class of sensors capable of wireless, passive, and battery-free operation. However, their applications are significantly limited by low sensitivity and bulky size in existing interrogation systems. In this thesis, I demonstrate techniques to solve these challenges by engineering the response of non-Hermitian systems that incorporate both gain and loss. Firstly, I show the interrogation sensitivity to a weakly coupled sensor can be greatly enhanced by configuring an exceptional point. Such a system can increase the sensitivity at least 3.2 times over existing methods in experiments. Next, I show the non-Hermitian system can self-track the sensor’s frequency by exploiting the Fano resonance in steady state. It significantly miniaturizes the readout to a scale of 3 cm. These results provide powerful tools for applying wireless sensors to modern medicine. | URI: | https://scholarbank.nus.edu.sg/handle/10635/186368 |
Appears in Collections: | Ph.D Theses (Open) |
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