PHOTOIONIZATION OF IMPURITIES IN HETEROJUNCTIONS

1992-01-01
ELKAWNI, MI
Tomak, Mehmet
The spectral dependence of the photoionization cross-section is calculated for shallow donors in GaAs/GaAlAs heterojunctions. The resulting spectra is found to be different for light polarized along and perpendicular to the growth direction. The calculations are repeated for both infinite- and finite-barrier models.
SURFACE SCIENCE

Suggestions

PHOTOIONIZATION OF IMPURITIES IN INFINITE-BARRIER QUANTUM-WELLS
ELSAID, M; Tomak, Mehmet (1991-01-01)
The dependence of the photoionization cross-section on photon energy is calculated for shallow donors in infinite-barrier GaAs/Ga(1-x)Al(x)As quantum well as a function of well width. The effect of a magnetic field is also considered.
PHOTOIONIZATION OF IMPURITIES IN QUANTUM-WELLS
ELSAID, M; Tomak, Mehmet (1992-06-01)
The dependence of photoionization cross-section on photon energy is calculated for shallow donors in quantum wells. The resulting spectra is completely different for light polarized along and perpendicular to the growth direction.
DEPENDENCE OF RESONANCE STATES ON DOPING LEVEL AND DOPING DISTRIBUTION TYPE IN GAAS GA0.75AL0.25AS SUPERLATTICE
Katırcıoğlu, Şenay (1994-05-10)
The electronic structure of a uniformly and modulation-doped GaAs/Ga0.75Al0.25As superlattice has been investigated by a self-consistent field calculation within the effective mass approximation for three different doping concentrations. It has been found that the resonance state energies show a strong dependence on the doping level and the doping distribution type of the superlattice.
Nonlinear optical properties of semiconductor heterostructures
Yıldırım, Hasan; Tomak, Mehmet; Department of Physics (2006)
The nonlinear optical properties of semiconductor heterostructures, such as GaAsAl/GaAs alloys, are studied with analytic and numerical methods on the basis of quantum mechanics. Particularly, second and third-order nonlinear optical properties of quantum wells described by the various types of confining potentials are considered within the density matrix formalism. We consider a Pöschl-Teller type potential which has been rarely considered in this area. It has a tunable asymmetry parameter, making it a goo...
Quantum mechanical calculation of nitrous oxide decomposition on transition metals
Karaöz, Muzaffer Kaan; Önal, Işık; Department of Chemical Engineering (2007)
Nitrous oxide decomposition on Ag51, Au51, Pt22, Rh51 and Ir51 clusters representing (111) surface were studied quantum mechanically by using the method of ONIOM with high layer DFT region and low layer of molecular mechanics region utilizing universal force field (UFF). The basis set employed in the DFT calculations is the Los Alamos LANL2DZ effective core pseudo-potentials (ECP) for silver, gold, platinum, rhodium and iridium and 3-21G** for nitrogen, oxygen and hydrogen. Nitrous oxide was decomposed on t...
Citation Formats
M. ELKAWNI and M. Tomak, “PHOTOIONIZATION OF IMPURITIES IN HETEROJUNCTIONS,” SURFACE SCIENCE, pp. 319–322, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47189.