Browsing by Author "Sari, H"
Now showing items 21-40 of 51
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Electronic properties of Si delta-doped GaAs under an applied electric field
We have theoretically investigated the electronic structure of Si delta -doped GaAs inserted into a quantum well under an applied electric field. For uniform distribution we have studied the influence of the electric field ... -
Electronic properties of two coupled Si delta-doped GaAs structures
We have theoretically investigated the subband structure of two coupled Si delta-doped GaAs at T = 0 K. For the uniform distribution we have studied the influence of the separation between the two doping layers. The ... -
The electronic structure of a quantum well under an applied electric field
The effects of an applied electric field on quantum well subband energies are calculated variationally within the effective mass approximation for model potential profiles. The concept of a quasi-bound state is examined ... -
Electronic structure of two coupled Si delta-doped GaAs as dependent on the donor thickness
For the uniform distribution we have theoretically investigated the influence of donor thickness on two coupled Si delta-doped GaAs structure, at T=0 K. Electronic structure have been calculated by solving the Schrodinger ... -
Electronic subband of single Si delta-doped GaAs structures
We have theoretically investigated the subband structure of single Si delta-doped GaAs inserted into a quantum well at T = 0 K. We will discuss the influence of the delta-doping concentration, the delta-layer thickness and ... -
Exciton absorption in quantum-well wires under the electric field
Kasapoglu, E; Sari, H; Bursal, M; Sokmen, I (ELSEVIER SCIENCE BV, 2003)The binding energy of excitons, and interband optical absorption in quantum-well wires of GaAs surrounded by Ga1-xAlxAs is calculated in effective-mass approximation, using a variational approach. Results obtained show ... -
Excitonic structure in a quantum well under the tilted magnetic field
Kasapoglu, E; Sari, H; Sokmen, I (AMER INST PHYSICS, 2000)By using an appropriate coordinate transform we have calculated variationally the ground state exciton binding energy in the single square well under the tilted magnetic field. The dependence of the binding energy to the ... -
Geometrical effects on shallow donor impurities in quantum wires
Kasapoglu, E; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2003)We have studied theoretically the impurity binding energy for wires of different shapes (V-shaped quantum wire (V-QWR) and rectangular wire) with a variational procedure without using any coordinate transformation. The ... -
Hydrogenic impurities in graded GaAs-(Ga,Al)As quantum-well wires in an electric field
Kasapoglu, E; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2002)The electric field dependence of polarizability and binding energy of shallow-donor impurities in graded quantum-well wires is calculated by a variational method and in the effective-mass approximation. We have considered ... -
Improvement in intersubband optical absorption and the effects of device parameter variations in quantum wells with an applied electric field
Kasapoglu, E; Sari, H; Ergun, Y; Sokmen, I (ACADEMIC PRESS LTD, 1999)The intersubband optical absorption in symmetric and asymmetric, single and coupled, double GaAs/Ga1-xAlxAs quantum wells is calculated. The results have been obtained in the presence of a uniform electric field as a ... -
Influence of an applied electric field on the electronic properties of Si delta-doped GaAs
We have theoretically studied the electronic structure of Si delta-doped GaAs inserted into an infinite quantum well as dependent on the applied electric field. For the uniform distribution we have investigated the influence ... -
Influence of temperature on the electronic properties of Si delta-doped GaAs structures
We have investigated theoretically the electronic structure of Si delta-doped GaAs layers at T = 0 K and at room temperature. For a nonuniform distribution, we have studied their sensitivity to the donor concentration and ... -
Intense field effects on shallow donor impurities in graded quantum wells
Sari, H; Kasapoglu, E; Sokmen, I; Balkan, N (IOP PUBLISHING LTD, 2003)Using a variational method and within the effective mass approximation, we calculate the laser-field dependence of binding energy and the polarizability of shallow-donor impurities in graded quantum wells under an external ... -
Intersubband optical absorption in a quantum well under a tilted magnetic field
Kasapoglu, E; Sari, H; Sokmen, I (ACADEMIC PRESS LTD, 2001)By using an appropriate coordinate transform we have calculated the intersubband optical absorption in the single square well under a tilted magnetic field. In this study the dependence of the intersubband transitions on ... -
Intersubband optical absorption in quantum wells under applied electric and intense laser fields
Within the framework of the effective mass approximation, we have theoretically investigated the linear intersubband optical absorption in a quantum well under external electric and intense laser field. Results obtained ... -
Intersubband transitions in coupled triple-graded quantum wells under an electric field
Kasapoglu, E; Sari, H; Sokmen, I (WILEY-V C H VERLAG GMBH, 2005)The intersubband transitions were calculated in three different shaped triple-graded quantum wells. The investigation involved changing the depth of the central well potential under an electric field applied parallel to ... -
Intersubband transitions in quantum wells under intense laser field
An intense laser field effect on the intersubband transitions in quantum wells is theoretically investigated within the framework of the effective-mass approximation. Results obtained show that intersubbband optical ... -
Magnetic field and intense laser radiation effects on the interband transitions in quantum well wires
Kasapoglu, E; Sari, H; Gunes, M; Sokmen, I (WORLD SCIENTIFIC PUBL CO PTE LTD, 2004)Magnetic field and intense laser radiation effects on the exciton binding energy and interband optical transitions in quantum well wires is calculated using a variational method and in the effective mass approximation. The ... -
Optical properties of excitons in quantum well wires under the magnetic field
Kasapoglu, E; Sari, H; Sokmen, I (WORLD SCIENTIFIC PUBL CO PTE LTD, 2003)The binding energy of excitons in quantum well wires of GaAs surrounded by Ga1-xAlxAs was calculated in an effective mass approximation with the use of the variational approach. Results obtained show that the exciton binding ... -
Optical transitions in quantum well wires under intense laser radiation
Sari, H; Kasapoglu, E; Sokmen, I; Gunes, M (ELSEVIER SCIENCE BV, 2003)The influence of a laser-field on the exciton binding energy and interband optical transitions in quantum-well wires is calculated by using a variational method and in the effective mass approximation. We conclude that in ...