Presentation Information
[Tu-P-42]Impact of Excitation Intensity on THz Bloch Oscillations in a GaAs-Based Superlattice: Possible Collapse of a Wannier–Stark Ladder on the Sub-Picosecond Scale
〇Kou Sato1, Takeya Unuma1 (1. Nagaoka Univ. of Tech. (Japan))
We show that high-density electrons in a biased GaAs-based superlattice excited by a femtosecond optical pulse can induce the collapse of a Wannier–Stark ladder during the initial cycle of THz Bloch oscillations through a dynamical screening effect.