scholarly journals Erratum: Enhanced sensitivity at higher-order exceptional points

Nature ◽  
2017 ◽  
Vol 551 (7682) ◽  
pp. 658-658 ◽  
Author(s):  
Hossein Hodaei ◽  
Absar U. Hassan ◽  
Steffen Wittek ◽  
Hipolito Garcia-Gracia ◽  
Ramy El-Ganainy ◽  
...  
Keyword(s):  
Higher Order ◽  
Exceptional Points ◽  
Enhanced Sensitivity

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.

Enhanced sensitivity at higher-order exceptional points

Nature ◽  
2017 ◽  
Vol 548 (7666) ◽  
pp. 187-191 ◽  
Author(s):  
Hossein Hodaei ◽  
Absar U. Hassan ◽  
Steffen Wittek ◽  
Hipolito Garcia-Gracia ◽  
Ramy El-Ganainy ◽  
...  
Keyword(s):  
Higher Order ◽  
Exceptional Points ◽  
Enhanced Sensitivity

On-chip high sensitivity rotation sensing based on higher-order exceptional points

2019 ◽  
Vol 36 (9) ◽  
pp. 2618
Author(s):  
Shuo Jiang ◽  
Xiaoyang Chang ◽  
Wenxiu Li ◽  
Peng Han ◽  
Yang Zhou ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Higher Order ◽  
Exceptional Points ◽  
Rotation Sensing ◽  
On Chip

HIGHER-ORDER SPECTRA IN NANOPARTICLE GAS SENSORS

2004 ◽  
Vol 04 (04) ◽  
pp. L597-L603 ◽  
Author(s):  
J. M. SMULKO ◽  
J. EDERTH ◽  
L. B. KISH ◽  
P. HESZLER ◽  
C. G. GRANQVIST
Keyword(s):  
Gas Sensors ◽  
Higher Order ◽  
Gas Detection ◽  
Enhanced Sensitivity ◽  
Sensitivity And Selectivity ◽  
Contour Plots ◽  
Non Gaussian ◽  
Higher Order Spectra ◽  
Resistance Fluctuations

It has previously been shown that resistance fluctuations in resistive sensors provide enhanced sensitivity and selectivity for gas detection. We report measurements and analysis of non-Gaussian components in nanoparticle Pd z ( WO 3)1- z film gas sensors, with z being 0.01 or 0.12, in different ambients. These components can be characterized by higher-order spectra. Contour plots are given of bispectra, and plots of integrated bispectra and trispectra. The phase of the integrated higher-order spectra is analyzed as well.

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.

scholarly journals A non-Hermitian \mathcal{P}\mathcal{T} symmetric Bose–Hubbard model: eigenvalue rings from unfolding higher-order exceptional points

2008 ◽  
Vol 41 (25) ◽  
pp. 255206 ◽  
Author(s):  
E M Graefe ◽  
U Günther ◽  
H J Korsch ◽  
A E Niederle
Keyword(s):  
Hubbard Model ◽  
Higher Order ◽  
Exceptional Points

Higher-order exceptional points in photonic systems (Conference Presentation)

2017 ◽  
Author(s):  
Hossein Hodaei ◽  
Absar U. Hassan ◽  
Steffen Wittek ◽  
Midya Parto ◽  
Hipolito Garcia-Gracia ◽  
...  
Keyword(s):  
Higher Order ◽  
Exceptional Points

Higher Order Exceptional Points in Discrete Photonics Platforms

2018 ◽  
pp. 261-275 ◽  
Author(s):  
M. H. Teimourpour ◽  
Q. Zhong ◽  
M. Khajavikhan ◽  
R. El-Ganainy
Keyword(s):  
Higher Order ◽  
Exceptional Points

Higher-order exceptional points: A route for flat-top optical filters

2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Nitzan Habler ◽  
Jacob Scheuer
Keyword(s):  
Optical Filters ◽  
Higher Order ◽  
Exceptional Points
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