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Plasmonic Nanoelectronics and Sensing by Hong-Son Chu, Er-Ping Li

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Chapter 7 Plasmonic biosensing devices and systems

To detect an analyte, surface plasmons whose characteristics are sensitive to the refractive-index variations close to the sensor’s surface are excited and measured. Binding of the target analyte onto the sensor’s surface will cause changes in refractive index and hence in the measured plasmonic characteristics. Depending on what type of surface plasmon is excited (e.g. surface plasmon polariton (SPP), Fano resonance), which plasmonic characteristic is measured/modulated (e.g. resonance wavelength, transmitted light intensity), and in what manner the bio-functionalization (i.e. binding of the target analyte) is performed, there are many different configurations for plasmonic biosensors, which ...

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