Ultrafast modulation of optical metamaterials.
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.
Cho
David J
DJ
Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.
Wu
Wei
W
Ponizovskaya
Ekaterina
E
Chaturvedi
Pratik
P
Bratkovsky
Alexander M
AM
Wang
Shih-Yuan
SY
Zhang
Xiang
X
Wang
Feng
F
Shen
Y Ron
YR
D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*