Measurement of the Deformation Potentials for GaAs using Polarized Photoluminescence

Optically oriented and detected electron spin resonance in a lightly doped n-GaAs layer

Spin resonance of localized electrons bound to donors in a specially designed n-GaAs layer has been performed at 236 MHz and 41 mT, using circular polarized light to polarize the electrons and photoluminescence to detect the electronic polarization. The polarization was diminished under the resonance condition. The electronic g factor obtained by this measurement is 20.4160.01. The resonance li...

Time-Dependent Thermo-Electro-Mechanical Creep Behavior of Radially Polarized FGPM Rotating Cylinder

Time-dependent creep analysis is crucial for the performance and reliability of piezoactuators used for high-precision positioning and load-bearing applications. In this study history of stresses, deformations and electric potential of hollow rotating cylinders made of functionally graded piezoelectric material (FGPM), e.g., PZT_7A have been investigated using Mendelson’s method of successive e...

Optically driven spin memory in n-doped InAs-GaAs quantum dots.

We show that the spin state of the resident electron in an n-doped self-assembled InAs-GaAs quantum dot can be written and read using nonresonant, circularly polarized optical pumping. A simple theoretical model is presented and accounts for the remarkable dynamics producing counterpolarized photoluminescence.

Spatially resolved study of polarized micro-photoluminescence spectroscopy on single GaAs nanowires with mixed zincblende and wurtzite phases

Midinfrared unipolar photoluminescence in InAs/GaAs self-assembled quantum dots

We have investigated the midinfrared unipolar photoluminescence in InAs/GaAs self-assembled quantum dots. Resonant emissions between confined levels are clearly observed at low temperature at around 10 mm wavelength. The unipolar emissions are polarized either in the layer plane or along the z growth axis of the quantum dots. The emissions are associated with hole transitions that involve the g...