volume | PIER Journals

Abstract

Parity-time (PT) reversal symmetry, as a representative example in the field of non-Hermitian physics, has attracted widespread research interest in the past few years due to its extraordinary wave dynamics. PT-symmetry enables unique spectral singularities, including the exceptional point (EP) degeneracy where two or more eigenvalues and eigenvectors coalesce, as well as the coherent perfect absorber-laser (CPAL) point where laser and its time-reversal counterpart (i.e., coherent perfect absorber) can coexist at the same frequency. These singular points not only give rise to new physical phenomena, but also provide new plausibility for building the next-generation sensors and detectors with unprecedented sensitivity. To date, investigations into EPs and CPAL points have unveiled their great potential in various sensing scenarios across a broad spectral range, spanning optics, photonics, electronics, and acoustics. In this review article, we will discuss on going developments of EP- and CPAL-based sensors composed of PT-synthetic structures and offer a glimpse into the future research directions in this emerging field.

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135. Yang, Minye, Zhilu Ye, Nabeel Alsaab, Mohamed Farhat, and Pai-Yen Chen, "In-vitro demonstration of ultra-reliable, wireless and batteryless implanted intracranial sensors operated on loci of exceptional points," IEEE Transactions on Biomedical Circuits and Systems, Vol. 16, No. 2, 287-295, 2022.

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Prof. Minye Yang

Dr. Zhilu Ye

Prof. Pai-Yen Chen

Dr. Danilo Erricolo