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Title: Second-order nonlinear optical metamaterials: ABC-type nanolaminates

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 = Al{sub 2}O{sub 3}, B = TiO{sub 2}, and C = HfO{sub 2}. 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, we find that the bulk second-order nonlinear susceptibility depends on the density of interfaces, leading to a nonlinear susceptibility of 0.26 pm/V at a wavelength of 800 nm. ABC-type nanolaminates can be deposited on virtually any substrate and offer a promising route towards engineering of second-order optical nonlinearities at both infrared and visible wavelengths.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [2] ;  [1] ;  [5] ; ;  [1] ;  [3] ;  [5]
  1. Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)
  2. Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)
  3. (CFN), Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)
  4. (KIT), 76021 Karlsruhe (Germany)
  5. (IMT), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen (Germany)
Publication Date:
OSTI Identifier:
22482119
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ALUMINIUM OXIDES; DEPOSITS; HAFNIUM OXIDES; INTERFACES; ITERATIVE METHODS; METAMATERIALS; NONLINEAR PROBLEMS; SUBSTRATES; TITANIUM OXIDES; WAVELENGTHS