Acoustic phonons in a piezoelectric [111] GaAs/AlAs superlattice

[1 1 1]B-oriented GaAsSb grown by gas source molecular beam epitaxy

“…It has been shown that the large piezoelectric field can substantially change the properties of the heterostructures and lead to nonlinear optic and electro-optical effects which have found applications in a number of nonlinear optical and electronic devices such as self-electro-optic effect devices [1,2]. In addition, the acousto-optical and electro-acoustic couplings in quantum well (QW)structures with piezoelectric field have been shown recently [3][4][5]. Ultrasonic waves propagation along the [1 1 1] direction can be induced by the piezoelectric field induced by a short light pulse, which would play an important role for future piezoelectric device application.…”