Asymmetric guidance of multiple hybrid modes through a gain-loss-assisted planar coupled-waveguide system hosting higher-order exceptional points

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Anubhav Paul ◽  
Arnab Laha ◽  
Sibnath Dey ◽  
Somnath Ghosh
Keyword(s):  
Higher Order ◽  
Exceptional Points ◽  
Waveguide System ◽  
Gain Loss

Unidirectional reflectionlessness and nonreciprocal perfect absorption in optical waveguide system based on phase coupling between two photonic crystal cavities

2018 ◽  
Vol 27 (01) ◽  
pp. 1850004 ◽  
Author(s):  
Shu Jing Liu ◽  
Cong Zhang ◽  
Ruiping Bai ◽  
Xintong Gu ◽  
Hong Da Yin ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Waveguide ◽  
Quality Factors ◽  
Phase Coupling ◽  
High Quality ◽  
Perfect Absorption ◽  
Photonic Crystal Cavities ◽  
Exceptional Points ◽  
Waveguide System ◽  
Distance Formula

We demonstrate the unidirectional reflectionlessness at exceptional points (EPs) and nonreciprocal perfect absorption near EPs based on phase coupling between two photonic crystal cavities (PCCs) in optical waveguide. In our scheme, when distance [Formula: see text][Formula: see text]nm ([Formula: see text][Formula: see text]nm), the reflectivities for forward and backward (backward and forward) directions are closed to [Formula: see text] and [Formula: see text] ([Formula: see text] and [Formula: see text]), respectively, and absorptances of the nonreciprocal perfect absorptions for forward and backward directions are [Formula: see text] and [Formula: see text] with the high quality factors of [Formula: see text] and [Formula: see text], respectively.

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

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.

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

scholarly journals Hierarchical Construction of Higher-Order Exceptional Points

2020 ◽  
Vol 125 (20) ◽  
Author(s):  
Q. Zhong ◽  
J. Kou ◽  
Ş. K. Özdemir ◽  
R. El-Ganainy
Keyword(s):  
Higher Order ◽  
Exceptional Points
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