Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

Institute of Nanotechnology, Institute of Applied Physics, and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany and Physikalisches Institut, University of Bonn, 53115 Bonn, Germany.
Physical Review Letters (Impact Factor: 7.51). 07/2012; 109(1):015502. DOI: 10.1103/PhysRevLett.109.015502
Source: PubMed


Optical experiments on second-harmonic generation from split-ring-resonator square arrays show a nonmonotonic dependence of the conversion efficiency on the lattice constant. This finding is interpreted in terms of a competition between dilution effects and linewidth or near-field changes due to interactions among the individual elements in the array.

Download full-text


Available from: Yevgen Grynko, Jun 25, 2015
19 Reads
  • Source
    • "In this work we extend the analysis done in [6] and study the geometrical factors that influence the SHG efficiency. For this purpose we use numerical simulations and assume hydrodynamic nature of the free electron gas in a metal 8,9 . "
    [Show abstract] [Hide abstract]
    ABSTRACT: Previous experimental measurements and numerical simulations give evidence of strong electric and magnetic field interaction between split-ring resonators in dense arrays. One can expect that such interactions have an influence on the second harmonic generation. We apply the Discontinuous Galerkin Time Domain method and the hydrodynamic Maxwell-Vlasov model to simulate the linear and nonlinear optical response from SRR arrays. The simulations show that dense placement of the constituent building blocks appears not always optimal and collective effects can lead to a significant suppression of the near fields at the fundamental frequency and, consequently, to the decrease of the SHG intensity. We demonstrate also the great role of the symmetry degree of the array layout which results in the variation of the SHG efficiency in range of two orders of magnitude.
    Proceedings of SPIE - The International Society for Optical Engineering 03/2013; DOI:10.1117/12.2003279 · 0.20 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We demonstrate the use of liquid crystal infiltration of fishnet structures for the realization of highly tunable and nonlinear optical metamaterials. We show that fishnet metamaterials infiltrated with nematic liquid crystals can exhibit strong nonlinear response at moderate laser powers. We also show that this nonlinear response arises due to the molecular orientation of the liquid crystal molecules and can be therefore be fine-tuned with an electric field, opening new opportunities for electrically tunable nonlinear metamaterials.
    Proceedings of SPIE - The International Society for Optical Engineering 01/2012; DOI:10.1117/12.931309 · 0.20 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: When light interacts with metal nanostructures, it can couple to free-electron excitations near the metal surface. The electromagnetic resonances associated with these surface plasmons depend on the details of the nanostructure, opening up opportunities for controlling light confinement on the nanoscale. The resulting strong electromagnetic fields allow weak nonlinear processes, which depend superlinearly on the local field, to be significantly enhanced. In addition to providing enhanced nonlinear effects with ultrafast response times, plasmonic nanostructures allow nonlinear optical components to be scaled down in size. In this Review, we discuss the principles of nonlinear plasmonic effects and present an overview of their main applications, including frequency conversion, switching and modulation of optical signals, and soliton effects.
    Nature Photonics 11/2012; 6(11):737-748. DOI:10.1038/nphoton.2012.244 · 32.39 Impact Factor
Show more