Paulo V. Santos

TL;DR: Spin transport and spin lifetime enhancement in GaAs quantum wells induced by the traveling piezoelectric field of a surface acoustic wave (SAW) are demonstrated, with slow spin relaxation attributed to a reduced electron-hole exchange interaction.

TL;DR: Foerster et al. as mentioned in this paper studied the effect of dynamic strain accompanying a surface acoustic wave on magnetic nanostructures in thermal equilibrium and showed that magnetization modes have a delayed response to the strain modes, adjustable by the magnetic domain configuration.

TL;DR: In this article, a compact optical waveguide modulator based on a Mach-Zehnder interferometer driven by surface acoustic waves was demonstrated, achieving peak-to-peak modulation exceeding 90% of the average transmission and operation in the gigahertz frequency range.

TL;DR: In this article, the focusing of SAWs by interdigital transducers (IDTs) deposited on (100)-oriented GaAs substrates was investigated, and it was shown that the focusing performance can be considerably improved by appropriate choice of the IDT metal pads, which, under appropriate conditions, create an acoustic waveguide within the IDTs.

TL;DR: It is demonstrated that the dynamics of mobile spins under external magnetic fields depends on the direction of motion in the QW plane, an intrinsic property of moving spins associated with the bulk inversion asymmetry of the underlying GaAs lattice.