Abstract
We report on electro-optic measurements of THz electric fields in the near-field of metal structures lying on GaP electro-optic sampling crystals. With (110) oriented crystals, the x or y component of the THz electric field is measured, whereas with a (001) oriented crystal, the z-component is measured. With an estimated spatial resolution of 20 µm, the technique allows us to map the field on a scale, orders of magnitude smaller than the spatial dimensions of these structures. We illustrate the technique by showing results of measurements of the THz electric field in a plane underneath a metal sphere and a single square hole in a metal foil. The technique provides us with a wealth of information on the time-evolution of light fields near metal structures.
| Original language | English |
|---|---|
| Pages (from-to) | 161-168 |
| Journal | Comptes Rendus Physique |
| Volume | 9 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2008 |
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Adam, A. J. L., Brok, J. M., Planken, P. C. M., Seo, M. A., & Kim, D. S. (2008). THz near-field measurements of metal structures. Comptes Rendus Physique, 9(2), 161-168. https://doi.org/10.1016/j.crhy.2007.07.005