Enhanced nonlinear effects in pulse propagation through epsilon‐near‐zero media

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  • Alessandro Ciattoni
    Consiglio Nazionale delle Ricerche CNR‐SPIN, Via Vetoio 10, 67100 L'Aquila Italy
  • Carlo Rizza
    Consiglio Nazionale delle Ricerche CNR‐SPIN, Via Vetoio 10, 67100 L'Aquila Italy
  • Andrea Marini
    ICFO‐Institut de Ciencies Fotoniques The Barcelona Institute of Science and Technology 08860 Castelldefels (Barcelona) Spain
  • Andrea Di Falco
    SUPA School of Physics and Astronomy, University of St. Andrews North Haugh, St. Andrews KY16 9SS United Kingdom
  • Daniele Faccio
    School of Engineering and Physical Sciences SUPA, Heriot‐Watt University Edinburgh EH14 4AS United Kingdom
  • Michael Scalora
    Charles M. Bowden Research Center RDMR‐WDS‐WO RDECOM, Redstone Arsenal Alabama 35898‐5000 USA

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<jats:title>Abstract</jats:title><jats:p>In recent years, unconventional metamaterial properties have triggered a revolution of electromagnetic research which has unveiled novel scenarios of wave‐matter interaction. A very small dielectric permittivity is a leading example of such unusual features, since it produces an exotic static‐like regime where the electromagnetic field is spatially slowly‐varying over a physically large region. The so‐called epsilon‐near‐zero metamaterials thus offer an ideal platform where to manipulate the inner details of the “stretched” field. Here we theoretically prove that a standard nonlinearity is able to operate such a manipulation to the point that even a thin slab produces a dramatic nonlinear pulse transformation, if the dielectric permittivity is very small within the field bandwidth. The predicted non‐resonant releasing of full nonlinear coupling produced by the epsilon‐near‐zero condition does not resort to any field enhancement mechanism and opens novel routes to exploiting matter nonlinearity for steering the radiation by means of ultra‐compact structures. <jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/png" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/lpor201500326-gra-0001-m.png"><jats:alt-text>image</jats:alt-text></jats:graphic></jats:boxed-text></jats:p>

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