Browsing by Author "Kasapoglu, E"
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Barrier thickness dependence of optical absorption of excitons in GaAs coupled quantum wire
Kasapoglu, E; Gunes, M; Sari, H; Sokmen, I (WORLD SCIENTIFIC PUBL CO PTE LTD, 2004)We have calculated the binding energy of excitons, and the interband optical absorption in rectangular coupled quantumwell wires of GaAs surrounded by Ga1chiAlchiAs in effectivemass approximation, using the variational ... 
Binding energies of excitons in symmetric and asymmetric quantum wells in a magnetic field
Kasapoglu, E; Sari, H; Ergun, Y; Elagoz, S; Sokmen, I (ACADEMIC PRESS LTD, 1998)The binding energy of the exciton in the symmetric and asymmetric GaAs/Ga1xAlxAs quantum wells is calculated with the use of a variational approach. Results have been obtained as a function of the potential symmetry, and ... 
Binding energies of shallow donor impurities in different shaped quantum wells under an applied electric field
Kasapoglu, E; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2003)We present a variational method to compute the binding energies for a hydrogenic impurity located at the center of the finite parabolic (PQW), Vshaped (VQW or full graded well) and square (SQW) GaAsGa1xAlxAs quantum ... 
Binding energy of excitons in symmetric and asymmetric coupled double quantum wells in a uniform magnetic field
Kasapoglu, E; Sari, H; Balkan, N; Sokmen, I; Ergun, Y (IOP PUBLISHING LTD, 2000)The binding energy of excitons in symmetric and asymmetric coupled double GaAs/Ga1xAlxAs quantum wells is calculated by using a variational approach. The results have been obtained in the presence of a uniform magnetic ... 
Binding energy of hydrogenic impurities in a quantum well under the tilted magnetic field
Kasapoglu, E; Sari, H; Sokmen, I (PERGAMONELSEVIER SCIENCE LTD, 2003)This paper treats theoretically the angle dependence of the ground state binding energy of a shallow donor impurity in semiconductor quantumwell systems on the tilted magnetic field. By making an appropriate coordinate ... 
The effect of an intense laser field on magneto donors in semiconductors
Sari, H; Kasapoglu, E; Sokmen, I (ELSEVIER SCIENCE BV, 2003)The laserfield dependence of the binding energy of shallowdonor impurities in graded, and square quantum wells under the external magnetic field is calculated by a variational method and in the effective mass approximation. ... 
Effect of crossed electric and magnetic fields on donor impurity binding energy
Kasapoglu, E; Sari, H; Sokmen, I (SPRINGERVERLAG, 2004)By using an appropriate coordinate transformation, we have calculated variationally the ground state binding energy of a hydrogenic donor impurity in a quantum well in the presence of crossed electric and magnetic fields ... 
The effect of hydrostatic pressure on optical transitions in quantumwell wires
Kasapoglu, E; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2004)Using a variational approach, we have investigated mainly, the effect of the hydrostatic pressure, and the wire dimension on the interband optical absorption and the exciton binding energy in a quantumwell wire. We have ... 
The effect of hydrostatic pressure on optical transitions in quantumwell wires (vol 353, pg 345, 2004)
Kasapoglu, E; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2005)… 
The effect of hydrostatic pressure on the photoionization crosssection and binding energy of impurities in quantumwell wire under the electric field
Kasapoglu, E; Yesilgul, U; Sari, H; Sokmen, I (ELSEVIER SCIENCE BV, 2005)Using a variational approach, we have calculated the hydrostatic pressure and electric field effects on the donorimpurity related photoionization crosssection and impurity binding energy in GaAs/GaAlAs quantum wellwires. ... 
Effects of crossed electric and magnetic fields on shallow donor impurity binding energy in a parabolic quantum well
Kasapoglu, E; Sari, H; Sokmen, I (IOP PUBLISHING LTD, 2004)We have calculated variationally the ground state binding energy of a hydrogenic donor impurity in a parabolic quantum well in the presence of crossed electric and magnetic fields. These homogeneous crossed fields are such ... 
The effects of hydrostatic pressure and applied electric field on shallow donor impurities in GaAs/GaAlAs graded quantum well
Kasapoglu, E; Sari, H; Sokmen, I (WORLD SCIENTIFIC PUBL CO PTE LTD, 2005)Using a variational approach, we have investigated the effects of the hydrostatic pressure, the well dimension, impurity position and electric field direction on the binding energy of shallow donor impurities in GaAs/GaAlAs ... 
The electric field dependence of a donor impurity in graded GaAs quantum wires
Kasapoglu, E; Sari, H; Sokmen, I (SPRINGER HEIDELBERG, 2004)The effect of the electric field on the binding energy of the ground state of a shallow donor impurity in a graded GaAs quantumwell wire (GQWW) was investigated. The electric field was applied parallel to the symmetry ... 
Exciton absorption in quantumwell 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 quantumwell wires of GaAs surrounded by Ga1xAlxAs is calculated in effectivemass 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 (Vshaped quantum wire (VQWR) and rectangular wire) with a variational procedure without using any coordinate transformation. The ... 
Hydrogenic impurities in graded GaAs(Ga,Al)As quantumwell 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 shallowdonor impurities in graded quantumwell wires is calculated by a variational method and in the effectivemass 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/Ga1xAlxAs quantum wells is calculated. The results have been obtained in the presence of a uniform electric field as a ... 
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 laserfield dependence of binding energy and the polarizability of shallowdonor 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 ...