Coherent-Resonance Enhancement of Sensing at the Exceptional Points

Chen, Jingming1,2,3; Xie, Qinnan1,2,4; Zhang, Jingjing1,2,4; Li, Zhuo5; Cui, Tie Jun1,2,4; Luo, Yu5,6

2024-04-01

10.1002/adom.202302268

ADVANCED OPTICAL MATERIALS   影响因子和分区

2195-1071

["The branch point singularities in the Riemann surface of the parameter space are known as the exceptional points (EPs), at which two or more eigenvalues and their associated eigenvectors simultaneously coalesce. The abrupt bifurcation property around an EP shows a strong spectral response to external perturbations, and hence, is exploited as a new approach to ultrasensitive sensors. Recently, an intriguing proposal for implementing second-order EPs in optical resonators with external perturbations has shown the superiority of non-Hermitian degeneracies in the enhancement of sensing. Of particular importance is further improving the sensitivity to even greater extents. To this end, a novel physical mechanism is proposed, namely introducing extra resonances of external Rayleigh scatterers to accomplish strong-coupling augmentation in sensing. The results, grounded by both theoretical coupled-mode-theory calculations and experimental spectral-domain measurements, show that the EP-based sensor working at the coherent resonance equips simultaneously substantial perturbation strength and azimuth sensitivity even subjected to extremely weak perturbations. This work paves the way to a new class of highly functional tunable sensors for applications in optics, microwave and acoustics.","A coherent-resonance exceptional point (EP) sensor is demonstrated theoretically and experimentally by introducing coherent resonance between the whispering gallery microcavity and two external sub-wavelength resonators. Compared to previous noncoherent EP sensors, this system significantly improves the sensitivity without increasing the order of EP. This proposed strategy is fairly general and can be extended to optical frequencies and even other wave systems. image"]

exceptional point non-Hermitian optical sensing spoof plasmonics

SCI ; EI

英语

其他

National Science Foundation of China["62271139","U21A20459","61871127","62288101"] ; Fund of Qing Lan Project of Jiangsu Province[1004-YQR22031] ; Fund of Prospective Layout of Scientific Research for Nanjing University of Aeronautics and Astronautics["1004-ILA22002","1004-ILA22068"] ; null[2022YFA1404903]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:001174202000001

WILEY-V C H VERLAG GMBH

Web of Science

1.Southeast Univ, Inst Electromagnet Space, Nanjing 210096, Peoples R China
2.Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Southeast Univ, Frontiers Sci Ctr Mobile Informat Commun & Secur, Nanjing 210096, Peoples R China
5.Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Key Lab Radar Imaging & Microwave Photon, Minist Educ, Nanjing 211106, Peoples R China
6.Nanyang Technol Univ, Sch Elect & Elect Engn, Nanyang Ave, Singapore 639798, Singapore

Chen, Jingming,Xie, Qinnan,Zhang, Jingjing,et al. Coherent-Resonance Enhancement of Sensing at the Exceptional Points[J]. ADVANCED OPTICAL MATERIALS,2024,12(10).

Chen, Jingming,Xie, Qinnan,Zhang, Jingjing,Li, Zhuo,Cui, Tie Jun,&Luo, Yu.(2024).Coherent-Resonance Enhancement of Sensing at the Exceptional Points.ADVANCED OPTICAL MATERIALS,12(10).

Chen, Jingming,et al."Coherent-Resonance Enhancement of Sensing at the Exceptional Points".ADVANCED OPTICAL MATERIALS 12.10(2024).