Physics – Condensed Matter
Scientific paper
2002-04-04
Physics
Condensed Matter
4 pages + 2 figs
Scientific paper
10.1063/1.1521573
We report first measurements of the ultrafast dynamics of interfacial electric fields in semiconductor multilayers using pump-probe second harmonic generation (SHG). A pump beam was tuned to excite carriers in all layers of GaAs/GaSb and GaAs/GaSb/InAs heterostructures. Further carrier dynamics manifests itself via electric fields created by by charge separation at interfaces. The evolution of interfacial fields is monitored by a probe beam through the eletric-field-induced SHG signal. We distinguish between several stages of dynamics originating from redistribution of carriers between the layers. We also find a strong enhancement of the induced electric field caused by hybridization of the conduction and valence bands at the GaSb/InAs interface.
Furdyna Jacek K.
Glinka Yu. D.
Liu Xiandong
Perakis I. E.
Sasaki Yuuya
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