Browsing by Author "Ungan, F."
Now showing items 21-40 of 70
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The effects of hydrostatic pressure and intense laser field on the linear and nonlinear optical properties of a square quantum well
Ungan, F.; Yesilgul, U.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2012)In this paper, the effects of hydrostatic pressure, temperature and intense laser field on the linear and non-linear optical processes in the conduction band of a square quantum well are numerically investigated in the ... -
Effects of indium and nitrogen mole concentrations on the optical properties in a GaInNas/GaAs quantum well under the intense laser field
Ungan, F.; Sakiroglu, S.; Yesilgul, U.; Erol, A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2013)The effect of indium and nitrogen mole concentrations on the nonlinear optical properties in a Ga1-xInxNyAs1-y/GaAs single quantum well under the intense laser field is theoretically studied within the effective mass ... -
The effects of intense laser field and applied electric and magnetic fields on optical properties of an asymmetric quantum well
Restrepo, R. L.; Ungan, F.; Kasapoglu, E.; Mora-Ramos, M. E.; Morales, A. L.; Duque, C. A. (ELSEVIER SCIENCE BV, 2015)This paper presents the results of the theoretical study of the effects of non resonant intense laser field and electric and magnetic fields on the optical properties (the linear and third order nonlinear refractive index ... -
The effects of intense laser field on optical responses of n-type delta doped GaAs quantum well under applied electric and magnetic fields
Sari, H.; Ungan, F.; Sakiroglu, S.; Yesilgul, U.; Sokmen, I (ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2018)This work presents the results of the theoretical study of the effects of non-resonant intense laser field, electric and magnetic fields on optical responses of GaAs n-type delta-doped quantum well associated to the electron ... -
Effects of magnetic field, hydrostatic pressure and temperature on the nonlinear optical properties in symmetric double semi-V-shaped quantum well
Yesilgul, U.; Ungan, F.; Al, E. B.; Kasapoglu, E.; Sari, H.; Sokmen, I. (SPRINGER, 2016)In this work, the effects of magnetic field, hydrostatic pressure and temperature on the linear and nonlinear optical properties in GaAs/AlxGa1-xAs symmetric double semi-V-shaped quantum well (DSVQWs) have been theoretically ... -
THE EFFECTS OF TEMPERATURE AND HYDROSTATIC PRESSURE ON THE DIAMAGNETIC SUSCEPTIBILITY OF A DONOR IN A QUANTUM WELL
Yesilgul, U.; Ungan, F.; Kasapoglu, E.; Sari, H.; Sokmen, I. (WORLD SCIENTIFIC PUBL CO PTE LTD, 2011)Using the effective-mass approximation within a variational scheme, we have calculated the diamagnetic susceptibility and binding energy of a hydrogenic donor in a quantum well under different temperatures and hydrostatic ... -
The effects of the electric and magnetic fields on the nonlinear optical properties in the step-like asymmetric quantum well
Kasapoglu, E.; Ungan, F.; Duque, C. A.; Yesilgul, U.; Mora-Ramos, M. E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2014)In the present work, total optical absorption coefficient (the linear and third-order nonlinear) and total refractive index change for transition between two first lower-lying electronic levels in the step-like GaAs/Ga1-xAlxAs ... -
The effects of the intense laser field on bound states in GaxIn1-x NyAs1-y/GaAs single quantum well
Ungan, F.; Kasapoglu, E.; Duque, C. A.; Yesilgul, U.; Sakiroglu, S.; Sokmen, I. (SPRINGER, 2011)We have investigated the effects of the intense laser field and nitrogen concentration on bound state energy levels in Ga (x) In1- (x) N (y) As1- (y) N/GaAs quantum well. The results show that both intense laser field and ... -
Electron Raman scattering in a double quantum well tuned by an external nonresonant intense laser field
Tiutiunnyk, A.; Mora-Ramos, M. E.; Morales, A. L.; Duque, C. M.; Restrepo, R. L.; Ungan, F.; Martinez-Orozco, J. C.; Kasapoglu, E.; Duque, C. A. (ELSEVIER SCIENCE BV, 2017)In this work we shall present a study of inelastic light scattering involving inter-subband electron transitions in coupled GaAs-(Ga,AI)As quantum wells. Calculations include the electron related Raman differential cross ... -
Electron-related optical responses in Gaussian potential quantum wells: Role of intense laser field
Sari, H.; Ungan, F.; Sakiroglu, S.; Yesilgul, U.; Kasapoglu, E.; Sokmen, I. (ELSEVIER SCIENCE BV, 2018)A theoretical study of the effects of non-resonant intense laser field on the optical response in a Gaussian potential quantum well is performed in the framework of the effective mass approximation. The obtained results ... -
Electron-related optical responses in triangular quantum dots
Tiutiunnyk, A.; Tulupenko, Y.; Mora-Ramos, M. E.; Kasapoglu, E.; Ungan, F.; Sari, H.; Sokmen, I.; Duque, C. A. (ELSEVIER SCIENCE BV, 2014)The linear and nonlinear coefficients for the optical absorption and relative refractive index change associated with intersubband transitions of electrons in the conduction band of a two-dimensional quantum dot of triangular ... -
Electron-related optical responses in triple delta-doped quantum wells
Ungan, F.; Mora-Ramos, M. E.; Kasapoglu, E.; Sari, H.; Sokmen, I. (TAYLOR & FRANCIS LTD, 2019)A detailed theoretical study on the electron-related optical responses in triple delta-doped GaAs quantum wells in the presence of non-resonant, monochromatic intense laser field is presented. For this purpose, we first ... -
Electronic band structure of GaAs/AlxGa1-xAs superlattice in an intense laser field
Sakiroglu, S.; Yesilgul, U.; Ungan, F.; Duque, C. A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2012)We perform theoretical calculations for the band structure of semiconductor superlattice under intense high-frequency laser field. In the frame of the non-perturbative approach, the laser effects are included via laser-dressed ... -
ELECTRONIC STRUCTURE AND BAND BENDING OF MODULATION-DOPED GaAs/Al-x Ga1-xAs SYMMETRIC AND ASYMMETRIC DOUBLE QUANTUM WELLS UNDER AN APPLIED ELECTRIC FIELD
Ungan, F.; Kasapoglu, E.; Sari, H.; Sokmen, I. (WORLD SCIENTIFIC PUBL CO PTE LTD, 2009)In this study, we have calculated theoretically the effects of the electric field and doping concentration on the sub-band energies, the electron population, and total charge density in modulation-doped symmetric and ... -
Electronic structure and optical properties of triangular GaAs/AlGaAs quantum dots: Exciton and impurity states
Tiutiunnyk, A.; Akimov, V.; Tulupenko, V.; Mora-Ramos, M. E.; Kasapoglu, E.; Ungan, F.; Sokmen, I.; Morales, A. L.; Duque, C. A. (ELSEVIER SCIENCE BV, 2016)Electronic structure and optical properties in equilateral triangular GaAs/Al0.3Ga0.7As quantum dots are studied extensively. The effects of donor and acceptor impurity atoms positioned in the orthocenter of the triangle, ... -
The functionality of the external electric and magnetic field on optical specifications of Rosen-Morse quantum well
Ungan, F.; Bahar, M. K. (IOP PUBLISHING LTD, 2019)In this study, for the first time, we probe the influences of the external electric and magnetic field (EF and MF) on the total refractive index changes (TRICs) and the total absorption coefficients (TACs) of quantum well ... -
Hydrogenic donor impurities in delta-doped cylindrical quantum dots under intense laser field
Sari, H.; Ungan, F.; Sakiroglu, S.; Yesilgul, U.; Sokmen, I. (IOP PUBLISHING LTD, 2019)A theoretical study of the effects of non-resonant intense laser field on the donor impurity binding energy in a cylindrical quantum dot with delta-doped axial potential is performed in the framework of the effective mass ... -
Hydrostatic Pressure and Temperature Effect on the Electron-Related Optical Responses in Symmetric and Asymmetric n-Type Double Delta-Doped GaAs Quantum Well Under Terahertz Laser Field
Ungan, F.; Mora-Ramos, M. E.; Sari, H.; Sokmen, I. (SPRINGER, 2019)The effects of non-resonant intense laser fields on the intersubband-related light absorption and relative refractive index change coefficients in symmetric and asymmetric n-type double -doped GaAs quantum wells are ... -
The hydrostatic pressure and temperature effects on donor impurities in cylindrical quantum wire under the magnetic field
Kasapoglu, E.; Ungan, F.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2010)The combined effects of hydrostatic pressure and temperature on donor impurity binding energy in cylindrical GaAs/Ga(0.7)Al(0.3)As quantum wire in the presence of the magnetic field have been studied by using a variational ... -
Impurity-related linear and nonlinear optical response in quantum-well wires with triangular cross section
Duque, C. A.; Mora-Ramos, M. E.; Kasapoglu, E.; Ungan, F.; Yesilgul, U.; Sakiroglu, S.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2013)The Is-like and 2p-like donor impurity energy states are studied in a semiconductor quantum wire of equilateral triangular cross section as functions of the impurity position and the geometrical size of the structure. ...