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@ARTICLE{Bittkau:61534,
      author       = {Bittkau, K. and Carius, R.},
      title        = {{N}ear-field study of optical modes in randomly textured
                      {Z}n{O} thin films},
      journal      = {Superlattices and microstructures},
      volume       = {42},
      issn         = {0749-6036},
      address      = {Oxford [u.a.]},
      publisher    = {Elsevier Science, Academic Press},
      reportid     = {PreJuSER-61534},
      pages        = {47 - 51},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We report on near-field scanning optical microscopy
                      measurements on randomly textured ZnO thin films. These
                      films are commonly used as transparent conducting oxide in
                      thin-film solar cells. Textured interfaces are used to
                      increase the scattering of light, which leads to a better
                      light trapping in the solar cell. Here, both the topography
                      and the local transmission are measured with a tapered fiber
                      tip with very high spatial resolution. By varying the
                      distance of the tip and the wavelength of the incident
                      light, the optical profile is visualized and reveals a
                      strong confinement of light on a subwavelength scale which
                      corresponds to ridges in the surface structure. The
                      confinement of light results from guided optical modes in
                      the ZnO which are accompanied by a modulated evanescent
                      field in air. No corresponding structure to this modulation
                      is found in the topography. These results give new insight
                      for further improvement of light trapping in solar cells.
                      (c) 2007 Elsevier Ltd. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IEF-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB813},
      pnm          = {Erneuerbare Energien},
      pid          = {G:(DE-Juel1)FUEK401},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000250271200009},
      doi          = {10.1016/j.spmi.2007.04.002},
      url          = {https://juser.fz-juelich.de/record/61534},
}