Attosecond kinetics of photoexcited germanium

Creators: Kraus, Peter M.; Kaplan, Christopher J.; Zuerch, Michael W.; Chang, Hung-Tzu; Jager, Marieke F.; Cushing, Scott K.; Borja, Lauren J.; Neumark, Daniel M.; Leone, Stephen R.

Abstract

Attosecond transient reflectivity is developed to observe the photoexcitation dynamics in germanium. Attosecond time-resolved measurements of the dielectric function reveal a few-femtosecond collective electronic response time, which renormalizes the Coulomb interaction between the excited carriers.

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