Browsing by Author "Sari, H."
Now showing items 1-20 of 90
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Binding energies of donor impurities in modulation-doped GaAs/AlxGa1-xAs double quantum wells under an electric field
Kasapoglu, E.; Ungan, F.; Sari, H.; Sokmen, I. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2009)In this study, we have investigated theoretically the binding energies of shallow donor impurities in modulation-doped GaAs/Al0.33Ga0.67 As double quantum wells (DQWs) under an electric field which is applied along the ... -
Binding energy and optical absorption of donor impurity states in "12-6" tuned GaAs/GaAlAs double quantum well under the external fields
Kasapoglu, E.; Sakiroglu, S.; Sari, H.; Sokmen, I; Duque, C. A. (ELSEVIER SCIENCE BV, 2019)We have investigated the binding energies of the s-symmetric ground and first excited shallow donor impurity states and the total 1s -> 2s absorption coefficient, including the first and third order corrections, in "12-6" ... -
Binding energy of impurity states in an inverse parabolic quantum well under magnetic field
Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2007)We have investigated the effects of the magnetic field which is directed perpendicular to the well on the binding energy of the hydrogenic impurities in an inverse parabolic quantum well (IPQW) with different widths as ... -
Combined effects of intense laser field and applied electric field on exciton states in GaAs quantum wells: Transition from the single to double quantum well
Duque, C. A.; Mora-Ramos, M. E.; Kasapoglu, E.; Sari, H.; Sokmen, I. (WILEY-V C H VERLAG GMBH, 2012)The effects of intense laser radiation on the exciton states in GaAs-Ga1xAlxAs quantum wells are studied with the inclusion of applied dc electric fields oriented along the growth direction of the system. The calculations ... -
Combined effects of intense laser field, electric and magnetic fields on the nonlinear optical properties of the step-like quantum well
Kasapoglu, E.; Duque, C. A.; Mora-Ramos, M. E.; Restrepo, R. L.; Ungan, F.; Yesilgul, U.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE SA, 2015)In the present work, the effects of the intense laser field on total optical absorption coefficient (the linear and third-order nonlinear) and total refractive index change for transition between two lower-lying electronic ... -
Combined effects of the intense laser field, electric and magnetic fields on the optical properties of n-type double delta-doped GaAs quantum well
Sari, H.; Kasapoglu, E.; Sakiroglu, S.; Yesilgul, U.; Ungan, F.; Sokmen, I. (ELSEVIER SCIENCE BV, 2017)In the present work, the effects of the non-resonant intense laser field, electric and magnetic fields on the optical properties, such as linear, third order nonlinear and the total optical absorption coefficient and ... -
Density of impurity states of hydrogenic impurities in an inverse parabolic quantum well under the magnetic field
Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2007)We investigated the effects of the magnetic field on the density of impurity states in a GaAs/GaAlAs inverse parabolic quantum well (lPQW) for different Al concentrations at the well center. The calculations were performed ... -
Dependence of impurity binding energy on nitrogen and indium concentrations for shallow donors in a GaInNAs/GaAs quantum well under intense laser field
Ungan, F.; Kasapoglu, E.; Sari, H.; Sokmen, I. (SPRINGER, 2011)Within the framework of the effective-mass approximation, using a variational method, we have calculated the effect of intense laser radiation on the binding energy of the shallow-donor impurities in a Ga1-xInxNyAs1-y/GaAs ... -
Donor impurity states and related optical responses in triangular quantum dots under applied electric field
Kasapoglu, E.; Ungan, F.; Sari, H.; Sokmen, I.; Mora-Ramos, M. E.; Duque, C. A. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2014)The linear and nonlinear coefficients for the optical absorption and relative refractive index change associated with transitions between donor impurity states in a two-dimensional quantum dot of triangular shape under ... -
Effect of applied external fields on the nonlinear optical properties of a Woods-Saxon potential quantum well
Ungan, F.; Mora-Ramos, M. E.; Yesilgul, U.; Sari, H.; Sokmen, I (ELSEVIER SCIENCE BV, 2019)In this present work a detailed theoretical study on the influence of the static electric, magnetic, and nonresonant intense THz laser fields on the nonlinear optical properties such as nonlinear optical rectification (NOR) ... -
The effect of hydrostatic pressure on subband structure and optical transitions in modulation-doped quantum well
Ungan, F.; Yesilgul, U.; Sakiroglu, S.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2011)Within the framework of effective-mass approximation, we have calculated theoretically the effects of hydrostatic pressure and doping concentration on subband structure and optical transitions in modulation-doped ... -
Effect of intense high-frequency laser field on the linear and nonlinear intersubband optical absorption coefficients and refractive index changes in a parabolic quantum well under the applied electric field
Yesilgul, U.; Ungan, F.; Sakiroglu, S.; Mora-Ramos, M. E.; Duque, C. A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2014)The effects of the intense high-frequency laser field on the optical absorption coefficients and the refractive index changes in a GaAs/GaAlAs parabolic quantum well under the applied electric field have been investigated ... -
The effect of intense laser field on the photoionization cross-section and binding energy of shallow donor impurities in graded quantum-well wire under an electric field
Kasapoglu, E.; Sari, H.; Yesilgul, U.; Sokmen, I. (IOP PUBLISHING LTD, 2006)The laser-field dependence of the impurity binding energy and donor-related photoionization cross-section in graded quantum-well wire under an external static electric field is calculated by a variational method and in the ... -
The effect of nitrogen on the diamagnetic susceptibility of a donor in GaxIn1-xNyAs1-y/GaAs quantum well under the magnetic field
Kilicarslan, E.; Sakiroglu, S.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2010)The binding energy and diamagnetic susceptibility of a hydrogenic donor in a GaxIn1-xNyAs1-y/GaAs quantum well has investigated in the presence of the magnetic field by using a trial wave function in the framework of the ... -
The effect of the intense laser field on the electronic states and optical properties of n-type double delta-doped GaAs quantum wells
Kasapoglu, E.; Yesilgul, U.; Ungan, F.; Sokmen, I.; Sari, H. (ELSEVIER SCIENCE BV, 2017)In this work, within the effective mass approximation we have performed a theoretical study of electronic states, the intersubband-related optical absorption coefficient and relative refractive index change properties in ... -
The effect of the intense laser field on the intersubband transitions in Ga1-xInxNyAs1-y/GaAs single quantum well
Ungan, F.; Kasapoglu, E.; Duque, C. A.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2011)The effect of the intense laser field on the intersubband optical absorption for (1-2) transition in a Ga1-xInxNyAs1-y/GaAs single quantum well for different nitrogen and indium concentrations is investigated. The numerical ... -
Effects of an in-plane magnetic field on the energy dispersion, spin texturing and conductance of double quantum wires
Gisi, B.; Karaaslan, Y.; Sakiroglu, S.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2016)We investigate the electronic structure, spin and transport properties of double quantum wires formed by a symmetric, double quartic-well potential subjected to an in-plane magnetic field by taking into account Rashba and ... -
Effects of an Intense Laser Field and Hydrostatic Pressure on the Intersubband Transitions and Binding Energy of Shallow Donor Impurities in a Quantum Well
Yesilgul, U.; Ungan, F.; Kasapoglu, E.; Sari, H.; Sokmen, I. (IOP PUBLISHING LTD, 2011)We have calculated the intersubband transitions and the ground-state binding energies of a hydrogenic donor impurity in a quantum well in the presence of a high-frequency laser field and hydrostatic pressure. The calculations ... -
Effects of an intense, high-frequency laser field on the binding energy of excitons confined in a GaInNAs/GaAs quantum well
Yesilgul, U.; Ungan, F.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2012)The effects of an intense, high-frequency laser field linearly polarized along the growth direction on the binding energy of excitons confined in a GaInNAs/GaAs quantum well is computed for different nitrogen and indium ...
