Real and Virtual Charge Polarizations in DC Biased Low-Dimensional Semiconductor Structures
Electric field effects on optical properties in mesoscopic structures, quantum wells (QW’s),1 quantum wires2 and quantum boxes (QB’s) or quantum dots2 have been attracting a great interest, both from stand points of physics and applications. In addition to conventional modulation scheme by external voltages, internal field modulations due to field screenings by real3,4 or virtual5,6 charges inside the DC-biased QWs, may give rise to unique and important applications including a low power optical bistable device and ultrafast optical nonlinear device.
KeywordsPump Pulse Pump Light Multiple Quantum Well Dephasing Time Multiple Quantum Well Structure
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