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Nonlinear terahertz spectroscopy of Higgs mode in superconductors

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Abstract

By using terahertz-pump and terahertz-probe spectroscopy, we observed the oscillation of superconducting order parameter, namely the Higgs amplitude mode, in s-wave superconductors. We revealed the nonlinear coupling between the Higgs mode and radiation field.

© 2015 Optical Society of America

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