Tutorials
Tutorial 1: Features of reflectivity curves
Tutorial 2: WinSpall SPR simulation software.
Also have a look at our theory section.
Tutorial 1 - Features of reflectivity curves
Full width at half maximum
The full width at half maximum. The “width of the plasmon” of a blank substrate depends on the imaginary part of the dielectric constant of the metal. This is why “silver plasmons” are much sharper, narrower than “gold plasmons”. For the blank measurement it is appropriate to adjust e'' such that the width of the model curve describes the measured data.
Most layers – if generated from organic molecules – do not absorb light at the typical SPR wavelength (red laser) and e''=0. Any broadening of the resonance curve is then typically caused by heterogeneities. In such cases the model calculation should capture the correct angular position of the plasmon and neglect the broadening.
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Res Tec Tutorial 1 - Features of reflectivity curves (pdf)