Second-order nonlinear optical metamaterials: ABC-type nanolaminates

@article{Alloatti2015SecondorderNO,
  title={Second-order nonlinear optical metamaterials: ABC-type nanolaminates},
  author={Luca Alloatti and Clemens Kieninger and Andreas Froelich and Matthias Lauermann and Tobias Frenzel and K. Koehnle and Wolfgang Freude and Juerg Leuthold and Martin Wegener and Christian Koos},
  journal={Applied Physics Letters},
  year={2015},
  volume={107},
  pages={121903}
}
We demonstrate a concept for second-order nonlinear metamaterials that can be obtained from non-metallic centrosymmetric constituents with inherently low optical absorption. The concept is based on iterative atomic-layer deposition of three different materials, A = Al2O3, B = TiO2, and C = HfO2. The centrosymmetry of the resulting ABC stack is broken since the ABC and the inverted CBA sequences are not equivalent—a necessary condition for non-zero second-order nonlinearity. In our experiments… Expand
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