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app:ters
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app:ters [2018/02/01 12:14] pklapetek |
app:ters [2018/02/02 09:45] pklapetek |
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| The second remarkeable effects is the antenna effect. When we prepare a structure with size that is comparable to the wavelength of the illuminating light, we form an antenna similarily like e.g. in radio communications. This leads to significant local enhancement of the electromagnetic field around the antenna due to resonance effects. Here we meet the enhancement, which is so important for TERS probes. An example of the antenna effect is shown in discussion of [[app:nanoantenna|Plasmonic nanoantenna]]. | The second remarkeable effects is the antenna effect. When we prepare a structure with size that is comparable to the wavelength of the illuminating light, we form an antenna similarily like e.g. in radio communications. This leads to significant local enhancement of the electromagnetic field around the antenna due to resonance effects. Here we meet the enhancement, which is so important for TERS probes. An example of the antenna effect is shown in discussion of [[app:nanoantenna|Plasmonic nanoantenna]]. | ||
| - | The apex size effect. | + | The apex also size contributes to the enhancement, by the lighting rod effect, based on its curvature. |
| Finally, we want to see a plasmonic field enhancement, a resonance effect if we use probe and sample that match together. This is however happening only in some measurements, as we often measure on materials that have not this ideal properties. | Finally, we want to see a plasmonic field enhancement, a resonance effect if we use probe and sample that match together. This is however happening only in some measurements, as we often measure on materials that have not this ideal properties. | ||
app/ters.txt · Last modified: 2018/02/02 10:32 by pklapetek
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