Metal/dielectric/metal sandwich film for broadband reflection reduction

نویسندگان

  • Yi-Jun Jen
  • Akhlesh Lakhtakia
  • Meng-Jie Lin
  • Wei-Hao Wang
  • Huang-Ming Wu
  • Hung-Sheng Liao
چکیده

A film comprising randomly distributed metal/dielectric/metal sandwich nanopillars with a distribution of cross-sectional diameters, displayed extremely low reflectance over the blue-to-red regime, when coated on glass and illuminated normally. When it is illuminated by normally incident light, this sandwich film (SWF) has a low extinction coefficient, its phase thickness is close to a negative wavelength in the blue-to-red spectral regime, and it provides weakly dispersive forward and backward impedances, so that reflected waves from the two faces of the SWF interfere destructively. Broadband reflection-reduction, over a wide range of incidence angles and regardless of the polarization state of the incident light, was observed when the SWF was deposited on polished silicon.

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عنوان ژورنال:

دوره 3  شماره 

صفحات  -

تاریخ انتشار 2013