Open AccessLocalized surface plasmon resonance biosensor: an improved technique for SERS response intensification
Author(s) -
Md. Saiful Islam,
Jakeya Sultana,
Rifat Ahmmed Aoni,
Md. Selim Habib,
Alex Dinovitser,
Brian W.H. Ng,
Derek Abbott
Publication year - 2019
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.001134
Subject(s) - surface plasmon resonance , refractive index , biosensor , analyte , materials science , plasmon , optics , surface plasmon , resonance (particle physics) , optoelectronics , sensitivity (control systems) , detection limit , localized surface plasmon , nanotechnology , nanoparticle , chemistry , physics , electronic engineering , particle physics , chromatography , engineering
As technology continues to advance, the development of novel sensing systems opens new possibilities for low-cost, practical biosensing applications. In this Letter, we demonstrate a localized surface plasmon resonance system that combines both wave-guiding and plasmonic resonance sensing with a single microstructured polymeric structure. Characterizing the sensor using the finite element method simulation shows, to the best of our knowledge, a record wavelength sensitivity (WS) of 111000 nm/refractive index unit (RIU), high amplitude sensitivity (AS) of 2050 RIU -1 , high sensor resolution and limit of detection of 9×10 -7 RIU and 8.12×10 -12 RIU 2 /nm, respectively. Furthermore, these sensors have the capability to detect an analyte within the refractive index range of 1.33-1.43 in the visible to mid-IR, therefore being potentially suitable for applications in biomolecular and chemical analyte detection.
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