Selective Coherent Excitation of Charged Density Waves

A.A. Tsvetkov*, D.M. Sagar, P.H.M. van Loosdrecht, D. van der Marel

*Corresponding author for this work

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Real time femtosecond pump-probe spectroscopy is used to study collective and single particle excitations in the charge density wave state of the quasi-1D metal, blue bronze. Along with the previously observed collective amplitudon excitation, the spectra show several additional coherent features. These additional resonances can be excited selectively by applying a sequence of pump pulses with intervals tuned to the period of the particular coherent excitation. A study of the pump power dependence shows a non-linear response of the amplitudon mode, in contrast to the linear power dependence of the single particle, phonon, and phason excitations, which is ascribed to the electron-amplitudon elastic scattering.
Original languageEnglish
Pages (from-to)387-390
Number of pages4
JournalActa Physica Polonica B
Issue number2
Publication statusPublished - 2003

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