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Ozerov, Igor
Centre Interdisciplinaire de Nanoscience de Marseille
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Uniform Huygens Metasurfaces with Postfabrication Phase Pattern Recording Functionalitycitations
- 2021Double-resonant second-harmonic generation in MoS2 nanoantennas
- 2021Double-resonant second-harmonic generation in MoS2 nanoantennas
- 2018Strong Nonlinear Optical Response in the Visible Spectral Range with Epsilon‐Near‐Zero Organic Thin Filmscitations
- 2017Nanofabrication of silicon Mie resonators and all-dielectric colored metasurfaces
- 2015Nanofabrication of optical structures (filters, resonators and sensors)
- 2014A graphene electron lens
- 2004ENHANCEMENT OF EXCITON EMISSION FROM ZnO NANOCRYSTALLINE FILMS BY PULSED LASER ANNEALING
- 2002Synthesis and Laser Processing of ZnO Nanocrystalline Thin Films
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article
Strong Nonlinear Optical Response in the Visible Spectral Range with Epsilon‐Near‐Zero Organic Thin Films
Abstract
<jats:title>Abstract</jats:title><jats:p>Enhanced Kerr nonlinearities are observed in metamaterials such as conducting oxides and doped inorganic semiconductor thin films showing epsilon‐near‐zero (ENZ) response in the infrared region. However, to achieve ENZ in the visible, artificial metamaterials with more complex nanostructures have to be specifically designed. Here, using sodium [5,6‐dichloro‐2‐[[5,6‐dichloro‐1‐ethyl‐3‐(4‐sulphobutyl)‐benzimidazol‐2‐ylidene]‐propenyl]‐1‐ethyl‐3‐(4‐sulphobutyl)‐benzimidazolium hydroxide] and [2,4‐bis[8‐hydroxy‐1,1,7,7‐tetramethyljulolidin‐9‐yl]squaraine] organic thin films, ENZ responses between 450 and 620 nm are demonstrated. Both nonlinear refractive index and nonlinear absorption coefficient are enhanced by more than two orders of magnitude in the ENZ spectral region. These optical effects in the visible spectral range come from the strongly dispersive permittivity of molecular aggregates resulting from the coupling of excitonic transition dipoles. These findings open the path toward a next generation of high‐performance solution‐processable organic nonlinear optical materials with ENZ properties that can be tuned by molecular engineering.</jats:p>