1.
IEEE Trans Ultrason Ferroelectr Freq Control
; 54(12): 2529-34, 2007 Dec.
Artículo
en Inglés
| MEDLINE
| ID: mdl-18276550
RESUMEN
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.