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On the Possibilities of Detecting Surface Charges with Second Harmonic Generation and Optical Diagnostics of Polymeric Insulators

Bengtsson, Magnus LU (2003)
Abstract
Optical second-harmonic generation can be a sensitive probe of atoms and molecules at a

surface or interface. For this reason, the method was chosen to study surface charges. Our

measurements have been limited by large fluctuations in the frequency-doubled light and

the mean value of the signals did not give any consistent changes due to changes in the

surface charge. A solid metal constituted the sample but if the goal of the experiment had

been to study any material configuration a silver-mica capacitor would have been a good

choice due to earlier research.

As the original intention of the project was to detect surface charges on polymeric

insulators a natural... (More)
Optical second-harmonic generation can be a sensitive probe of atoms and molecules at a

surface or interface. For this reason, the method was chosen to study surface charges. Our

measurements have been limited by large fluctuations in the frequency-doubled light and

the mean value of the signals did not give any consistent changes due to changes in the

surface charge. A solid metal constituted the sample but if the goal of the experiment had

been to study any material configuration a silver-mica capacitor would have been a good

choice due to earlier research.

As the original intention of the project was to detect surface charges on polymeric

insulators a natural generalisation of the project has been to characterise polymeric

insulator materials and we have started this by studying biological growths, like algae and

fungi. Both are crucial for the performance of the material. In cooperation with Andreas

Demfalk at the Chalmers University of Technology the presence of algae and fungi could

readily be remotely detected. (Less)
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English
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yes
id
c54164ff-7003-4a45-9578-2772797640bc (old id 2259985)
date added to LUP
2012-01-26 11:08:02
date last changed
2016-09-19 08:45:19
@misc{c54164ff-7003-4a45-9578-2772797640bc,
  abstract     = {Optical second-harmonic generation can be a sensitive probe of atoms and molecules at a<br/><br>
surface or interface. For this reason, the method was chosen to study surface charges. Our<br/><br>
measurements have been limited by large fluctuations in the frequency-doubled light and<br/><br>
the mean value of the signals did not give any consistent changes due to changes in the<br/><br>
surface charge. A solid metal constituted the sample but if the goal of the experiment had<br/><br>
been to study any material configuration a silver-mica capacitor would have been a good<br/><br>
choice due to earlier research.<br/><br>
As the original intention of the project was to detect surface charges on polymeric<br/><br>
insulators a natural generalisation of the project has been to characterise polymeric<br/><br>
insulator materials and we have started this by studying biological growths, like algae and<br/><br>
fungi. Both are crucial for the performance of the material. In cooperation with Andreas<br/><br>
Demfalk at the Chalmers University of Technology the presence of algae and fungi could<br/><br>
readily be remotely detected.},
  author       = {Bengtsson, Magnus},
  language     = {eng},
  note         = {Licentiate Thesis},
  title        = {On the Possibilities of Detecting Surface Charges with Second Harmonic Generation and Optical Diagnostics of Polymeric Insulators},
  year         = {2003},
}