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  • 标题:An Interplay between Lossy Mode Resonance and Surface Plasmon Resonance and Their Sensing Applications
  • 本地全文:下载
  • 作者:Deependra Singh Gaur ; Ankit Purohit ; Satyendra Kumar Mishra
  • 期刊名称:Biosensors
  • 电子版ISSN:2079-6374
  • 出版年度:2022
  • 卷号:12
  • 期号:9
  • DOI:10.3390/bios12090721
  • 语种:English
  • 出版社:MDPI Publishing
  • 摘要:Conducting metal oxide (CMO) supports lossy mode resonance (LMR) at the CMO-dielectric interface, whereas surface plasmon resonance (SPR) occurs at the typical plasmonic metal-dielectric interface. The present study investigates these resonances in the bi-layer (ITO + Ag) and tri-layer (ITO + Ag + ITO) geometries in the Kretschmann configuration of excitation. It has been found that depending upon the layer thicknesses one resonance dominates the other. In particular, in the tri-layer configuration of ITO + Ag + ITO, the effect of the thickness variation of the sandwiched Ag layer is explored and a resonance, insensitive to the change in the sensing medium refractive index (RI), has been reported. Further, the two kinds of RI sensing probes and the supported resonances have been characterized and compared in terms of sensitivity, detection accuracy and figure of merit. These studies will not only be helpful in gaining a better understanding of underlying physics but may also lead to the realization of biochemical sensing devices with a wider spectral range.
  • 关键词:optical fiber sensor;surface plasmon resonance;lossy mode resonance;indium-tin oxide;silver;sensitivity;detection accuracy
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