Piezoelectric Gate for a Two-Dimensional Electron System Transport in LiNbO3-GaAs/AlGaAs Sandwich Structures

Standing-wave piezoelectric fields in the LiNbO(3) driving plate are used to form depleted and accumulated electron densities in GaAs/AlGaAs quantum wells (QWs). The photoluminescence spectrum of the two-dimensional electron system varies both spatially and temporally, exhibiting an electron-hole pl...

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Veröffentlicht in:	IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2007-12, Vol.54 (12), p.2529-2534
Hauptverfasser:	KOROTCHENKOV, Oleg A, POLOVINA, Oleksiy I, KURYLYUK, Vasyl V
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic transport in condensed matter Exact sciences and technology Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Photoluminescence Physics
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Beschreibung
Zusammenfassung:	Standing-wave piezoelectric fields in the LiNbO(3) driving plate are used to form depleted and accumulated electron densities in GaAs/AlGaAs quantum wells (QWs). The photoluminescence spectrum of the two-dimensional electron system varies both spatially and temporally, exhibiting an electron-hole plasma recombination and exciton and trion emissions at large and small electron densities, respectively. Controlling the piezoelectric field component perpendicular to the QW layers offers a versatile tool to achieve the spatially indirect exciton luminescence in double QW structures.
ISSN:	0885-3010 1525-8955
DOI:	10.1109/TUFFC.2007.572