｜主題：The Current Status and Future Promise of Plasmonic Biosensors
The resonant coupling of electromagnetic waves to collective oscillations of free electrons in metals, known as surface plasmon resonance (SPR), has been exploited largely because of the possible control of light properties at the nanometer scale. SPR is an important sensing technology in biosensors that can be modulated by materials and optical systems to improve sensing sensitivity. The increase in the local electric field is caused by local plasmon resonance and evanescent field effects. When the excitation light approaches the resonance frequency of the nanostructure, the localized surface plasmon effect generates a strong local evanescent electric field on the surface and edges of the structure. Therefore, enhancing the interface electric field effect improves the sensing sensitivity.
The rapid development of SPR biosensors, structural design concepts, fabrication techniques, sensing materials, numerical simulations, and diagnostic applications will help to significantly improve the accuracy and sensitivity of detection in future clinical applications.