Enhanced Sensitivity at Magnetic High-Order Exceptional Points and Topological Energy Transfer in Magnonic Planar Waveguides

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
Xi-guang Wang ◽  
Guang-hua Guo ◽  
Jamal Berakdar
Keyword(s):  
Energy Transfer ◽  
High Order ◽  
Planar Waveguides ◽  
Exceptional Points ◽  
Enhanced Sensitivity

scholarly journals Enhanced sensitivity at high-order exceptional points in a passive wireless sensing system

2019 ◽  
Vol 27 (20) ◽  
pp. 27562 ◽  
Author(s):  
Chao Zeng ◽  
Yong Sun ◽  
Guo Li ◽  
Yunhui Li ◽  
Haitao Jiang ◽  
...  
Keyword(s):  
High Order ◽  
Wireless Sensing ◽  
Exceptional Points ◽  
Sensing System ◽  
Enhanced Sensitivity ◽  
Wireless Sensing System

scholarly journals Observation of higher-order exceptional points in a non-local acoustic metagrating

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Xinsheng Fang ◽  
Nikhil J R K Gerard ◽  
Zhiling Zhou ◽  
Hua Ding ◽  
Nengyin Wang ◽  
...  
Keyword(s):  
Free Space ◽  
Higher Order ◽  
Exceptional Points ◽  
Enhanced Sensitivity ◽  
Topological Features ◽  
Simultaneous Control ◽  
Multiple Orders ◽  
Fundamental Research ◽  
Non Local ◽  
Space Wave

AbstractHigher-order exceptional points have attracted increased attention in recent years due to their enhanced sensitivity and distinct topological features. Here, we show that non-local acoustic metagratings enabling precise and simultaneous control over their multiple orders of diffraction can serve as a robust platform for investigating higher-order exceptional points in free space. The proposed metagratings, not only could advance the fundamental research of arbitrary order exceptional points, but could also empower unconventional free-space wave manipulation for applications related to sensing and extremely asymmetrical wave control.

Fourth order exceptional points with spinning resonators

2022 ◽  
Author(s):  
Haoye Qin ◽  
Yiheng Yin ◽  
Ming Ding
Keyword(s):  
Fourth Order ◽  
Light Propagation ◽  
High Efficiency ◽  
Optical Resonators ◽  
Second Order ◽  
Exceptional Points ◽  
Enhanced Sensitivity ◽  
Order Case ◽  
Symmetric Systems

Abstract Investigation of exceptional points mostly focuses on the second order case and employs the gain-involved parity-time (PT) symmetric systems. Here, we propose an approach to implementing fourth order exceptional points (FOEPs) using directly coupled optical resonators with rotation. On resonance, the system manifests FOEP through tuning the spinning velocity to targeted values. Eigenfrequency bifurcation and enhanced sensitivity for nanoparticle have been presented. Also, near FOEP, nonreciprocal light propagation exhibits great boost and dramatic change, which may be applied to high-efficiency isolators and circulators.

High-order exceptional points in non-Hermitian Moiré lattices

2019 ◽  
Vol 14 (5) ◽  
Author(s):  
Yan-Rong Zhang ◽  
Ze-Zheng Zhang ◽  
Jia-Qi Yuan ◽  
Ming Kang ◽  
Jing Chen
Keyword(s):  
High Order ◽  
Exceptional Points

scholarly journals High‐order exceptional points and enhanced sensing in subwavelength resonator arrays

2020 ◽  
Author(s):  
Habib Ammari ◽  
Bryn Davies ◽  
Erik Orvehed Hiltunen ◽  
Hyundae Lee ◽  
Sanghyeon Yu
Keyword(s):  
High Order ◽  
Exceptional Points ◽  
Resonator Arrays
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