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2017 ; 7
(1
): 1065
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Experimental evidence of Fano resonances in nanomechanical resonators
#MMPMID28432315
Stassi S
; Chiadō A
; Calafiore G
; Palmara G
; Cabrini S
; Ricciardi C
Sci Rep
2017[Apr]; 7
(1
): 1065
PMID28432315
show ga
Fano resonance refers to an interference between localized and continuum states
that was firstly reported for atomic physics and solid-state quantum devices. In
recent years, Fano interference gained more and more attention for its importance
in metamaterials, nanoscale photonic devices, plasmonic nanoclusters and
surface-enhanced Raman scattering (SERS). Despite such interest in nano-optics,
no experimental evidence of Fano interference was reported up to now for purely
nanomechanical resonators, even if classical mechanical analogies were referred
from a theoretical point of view. Here we demonstrate for the first time that
harmonic nanomechanical resonators with relatively high quality factors, such as
cantilevers vibrating in vacuum, can show characteristic Fano asymmetric curves
when coupled in arrays. The reported findings open new perspectives in
fundamental aspects of classical nanomechanical resonators and pave the way to a
new generation of chemical and biological nanoresonator sensors with higher
parallelization capability.