期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.233901
关键词
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资金
- People Programme (Marie Curie Actions) of the European Union's FP7 Programme under REA Grant [627478, 329346]
- AFOSR MURI Grant [FA9550-14-1-0389]
- AFOSR Grant [FA9550-14-1-0138]
- NSF MRSEC Grant [DMR-1120923]
- European Research Council under the European Union Seventh Framework Programme (FP)/ERC [GA 306559]
- EPSRC (UK) [EP/M009122/1]
- EPSRC [EP/J015040/1, EP/M009122/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J015040/1, EP/M009122/1] Funding Source: researchfish
New propagation regimes for light arise from the ability to tune the dielectric permittivity to extremely low values. Here, we demonstrate a universal approach based on the low linear permittivity values attained in the epsilon-near-zero (ENZ) regime for enhancing the nonlinear refractive index, which enables remarkable light-induced changes of the material properties. Experiments performed on Al-doped ZnO (AZO) thin films show a sixfold increase of the Kerr nonlinear refractive index (n(2)) at the ENZ wavelength, located in the 1300 nm region. This in turn leads to ultrafast light-induced refractive index changes of the order of unity, thus representing a new paradigm for nonlinear optics.
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