Journal article
Terahertz beam focusing based on plasmonic waveguide scattering



Publication Details
Authors:
Monnai, Y.; Altmann, K.; Jansen, C.; Koch, M.; Hillmer, H.; Shinoda, H.
Publication year:
2012
Journal:
Applied Physics Letters
Pages range:
151116
Journal acronym:
Appl. Phys. Lett.
Volume number:
101
ISSN:
0003-6951

Abstract
We demonstrate free-space focusing of terahertz (THz) radiation by scatteringplasmonic surface-waves into the air. We use a grating of shallow holes which contains non-equidistant defects which act as scattering centers. The scattering occurs with defined phase delays such that the waves emitted in free-space interfere constructively to form a focus above the waveguidesurface. In contrast to conventional lenses, this structure does not require any free-space on its backside and has great potential for integrated THz optics.


Authors/Editors

Last updated on 2019-25-07 at 15:26