Study of the RPA pair-correlation function in GaAs-AlGaAs parabolic quantum well wires

Excitons in undoped AlGaAs/GaAs wide parabolic quantum wells

In this work the electronic structure of undoped AlGaAs/GaAs wide parabolic quantum wells (PQWs) with different well widths (1000 Å and 3000 Å) were investigated by means of photoluminescence (PL) measurements. Due to the particular potential shape, the sample structure confines photocreated carriers with almost three-dimensional characteristics. Our data show that depending on the well width t...

Modeling of novel lateral AlGaAs/GaAs quantum well solar cell

In this paper, a novel lateral quantum well (QW) solar cell has been introduced, and the structural parameters effects of these Nano-structures on the device’s performance have been investigated. For modeling, the continuity equation has been solved in the quasi neutral regions. However, to analyze the QWs’ effects, first Schrodinger – Poisson’s equations have been solved self-consistently. To ...

Refractive index of interdiffused AlGaAs/GaAs quantum well

EXCITON-PHONON SYSTEM IN GaAs-Ga1-xAlxAs QUANTUM-WELL WIRES

The binding energies o f l i gh t and heavyhole exciton-phonon systems i n GaAs-Ga A1 As quantum wires are calculated as a function o f the s i z e s o f the I-x x wire for Several values of the heights o f the barrier potential. I t is found that the corrections due t o exciton-phonon coupling are quite s igni f icant . In the last few years some progress has been done in the study of electron...

Toward soliton emission in asymmetric GaAs/AlGaAs multiple-quantum-well waveguide structures below the half-bandgap.

We report what is to our knowledge the first experimental evidence of nonlinear beam displacement in a strip-loaded GaAs/AlGaAs multiple-quantum-well waveguide with an asymmetric, nonlinear cladding. An intensity-dependent spatial displacement of ~2 mum was observed for the guided mode at a wavelength of 1.55 mum. Numerical simulations that correspond to the experiment are also presented. The d...