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Femtosecond Buildup of a Many-Body Resonance Observed via Two-Dimensional THz Time-Domain Spectroscopy

Huber, Rupert ; Tauser, F. ; Brodschelm, A. ; Leitenstorfer, A.
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Date of publication of this fulltext: 31 Jan 2011 12:52


Abstract

In a non-equilibrium electron–hole plasma photoexcited in GaAs within 10 fs, we observe how a plasmon pole builds up on a femtosecond time scale. To this end, the dynamics of the complex dielectric function throughout the mid-infrared is probed with uncertainty-limited temporal resolution by means of ultrabroadband THz spectroscopy. We show that collective effects, such as plasma oscillations, ...

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