S. Markmann, M. Franckié, S. Pal, M. Fiebig, D. Stark, M. Beck, G. Scalari, J. Faist
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2D - THz-Spectroscopy on a Quantum Cascade Structure
We use two-dimensional (2D) THz-spectroscopy to study the $\chi^{(3)}$ non-linearities originating from four-wave mixing (FWM) in a quantum cascade structure (QCS), embedded in a single-plasmon waveguide. This approach allows us to extract the strength of all system non-linearities, study time-resolved system properties such as population and coherence lifetimes, as well as identify the dominant scattering mechanisms of the unbiased QCS at 10K.
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