ISSN:
0392-6737
Keywords:
Electron states in low-dimensional structures (including quantum wells, superlattices, layer structures, and intercalation compounds)
;
Dielectric, piezoelectric, and ferroelectric materials
;
Electrooptical effects
;
Conference proceedings
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Summary We describe an experimental and theoretical investigation of Wannier-Stark ladders in the optical spectra of (111)B InGaAs/GaAs piezoelectric superlattices. A unique feature of these structures is that an external electric field can be used to produce a flat superlattice—that is zero overall potential drop per period—in which there are large, opposing fields in the well and barrier. These fields cause a spatial separation of the electron and hole wave functions in the axial direction, leading to Stark ladderss which are intermediate between Type I (electrons and holes together) and Type II (electrons and holes separated by half a period) in character.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02457279
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