TY - JOUR
T1 - Enhanced avionic sensing based on Wigner's cusp anomalies
AU - Kononchuk, Rodion
AU - Feinberg, Joshua
AU - Knee, Joseph
AU - Kottos, Tsampikos
N1 - Publisher Copyright:
© 2021 The Authors.
PY - 2021/6
Y1 - 2021/6
N2 - Typical sensors detect small perturbations by measuring their effects on a physical observable, using a linear response principle (LRP). It turns out that once LRP is abandoned, new opportunities emerge. A prominent example is resonant systems operating near Nth-order exceptional point degeneracies (EPDs) where a small perturbation ϵ ≪ 1 activates an inherent sublinear response ∼ N√ - ϵ ≫ ϵ in resonant splitting. Here, we propose an alternative sublinear optomechanical sensing scheme that is rooted in Wigner's cusp anomalies (WCAs), first discussed in the framework of nuclear reactions: A frequency-dependent square-root singularity of the differential scattering cross section around the energy threshold of a newly opened channel, which we use to amplify small perturbations. WCA hypersensitivity can be applied in a variety of sensing applications, besides optomechanical accelerometry discussed in this paper. Our WCA platforms are compact, do not require a judicious arrangement of active elements (unlike EPD platforms), and, if chosen, can be cavity free.
AB - Typical sensors detect small perturbations by measuring their effects on a physical observable, using a linear response principle (LRP). It turns out that once LRP is abandoned, new opportunities emerge. A prominent example is resonant systems operating near Nth-order exceptional point degeneracies (EPDs) where a small perturbation ϵ ≪ 1 activates an inherent sublinear response ∼ N√ - ϵ ≫ ϵ in resonant splitting. Here, we propose an alternative sublinear optomechanical sensing scheme that is rooted in Wigner's cusp anomalies (WCAs), first discussed in the framework of nuclear reactions: A frequency-dependent square-root singularity of the differential scattering cross section around the energy threshold of a newly opened channel, which we use to amplify small perturbations. WCA hypersensitivity can be applied in a variety of sensing applications, besides optomechanical accelerometry discussed in this paper. Our WCA platforms are compact, do not require a judicious arrangement of active elements (unlike EPD platforms), and, if chosen, can be cavity free.
UR - http://www.scopus.com/inward/record.url?scp=85107309085&partnerID=8YFLogxK
U2 - 10.1126/sciadv.abg8118
DO - 10.1126/sciadv.abg8118
M3 - Article
C2 - 34088674
AN - SCOPUS:85107309085
SN - 2375-2548
VL - 7
JO - Science advances
JF - Science advances
IS - 23
M1 - eabg8118
ER -