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Molecular detection by active Fano‐sensor
Author(s) -
Tao Yifei,
Guo Zhongyi
Publication year - 2017
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201600259
Subject(s) - fano resonance , fano plane , resonance (particle physics) , plasmon , materials science , surface plasmon resonance , absorption (acoustics) , optoelectronics , nanostructure , signal (programming language) , molecule , position (finance) , nanosensor , nanotechnology , physics , optics , computer science , atomic physics , nanoparticle , mathematics , finance , quantum mechanics , pure mathematics , economics , programming language
The optical properties and sensing performances of the molecular sensors based on plasmonic Fano‐resonance (PFR) nanostructures have been numerically investigated in detail. The on‐resonance sensor, in which the Fano‐resonance position is overlapping with the absorption‐band of the detected molecules perfectly, reveals a powerful ability to detect the molecules with a low concentration or thin thickness. By the bias‐modulation of a single‐layer graphene, the Fano‐resonance position of the nanostructures can be tuned effectively. On being modulated properly, the PFR sensor shows an ultrahigh performance because of the unprecedentedly high overlap of the Fano‐resonance position with the absorption‐band of molecules, which is enabling superior signal strength in the molecular detections based on their vibrational fingerprints. Our proposed strategy may enable the development of dynamic sensors and open exciting prospects for bio‐sensing.