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Opt Express. 2009 Sep 28;17(20):17652-7. doi: 10.1364/OE.17.017652.

Ultrafast modulation of optical metamaterials.

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  • 1Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.


We show by pump-probe spectroscopy that the optical response of a fishnet metamaterial can be modulated on the femtosecond time scale. The modulation dynamics is dominated by pump-induced changes in the constituting dielectric medium, but the strength of modulation is dramatically enhanced through the plasmon resonance. The pump-induced spectral responses of the metamaterial provide understanding on how the resonance is modified by pump excitation. Our study suggests that metamaterials can be used as high-speed amplitude/phase modulators with terahertz-bandwidth.

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