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Wednesday, October 14, 2015
Abstract-Strong Terahertz-Field Effect on Electron-Hole System in Quantum Wells
We present strong terahertz light can modulate electron-hole pair creations in 2D-semiconductors. By means of THz pump and optical probe spectroscopy, we observed a strong spectral modulation of the 1s heavy-hole exciton peak of GaAs quantum wells due to Rabi splitting below 10 kV/cm. We also confirmed Franz-Keldysh type spectral modulation and its novel time-dependence in the higher field as high as 50 kV/cm.