Browsing by Author "Duque, C. A."
Now showing items 21-40 of 45
-
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 ... -
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 states in GaAs-(Al, Ga) As eccentric quantum rings under nonresonant intense laser and magnetic fields
Vinasco, J. A.; Radu, A.; Niculescu, E.; Mora-Ramos, E.; Feddi, E.; Tulupenko, V.; Restrepo, R. L.; Kasapoglu, E.; Morales, A. L.; Duque, C. A. (NATURE PUBLISHING GROUP, 2019)The features of the electron energy spectrum in eccentric two-dimensional GaAs-AlGaAs quantum rings of circular shape are theoretically investigated taking into account the effect of externally applied magnetic and intense ... -
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, ... -
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. ... -
Intense laser effects on donor impurity in a cylindrical single and vertically coupled quantum dots under combined effects of hydrostatic pressure and applied electric field
Duque, C. A.; Kasapoglu, E.; Sakiroglu, S.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2010)Using the effective mass and parabolic band approximations and a variational procedure we have calculated the combined effects of intense laser radiation, hydrostatic pressure, and applied electric field on shallow-donor ... -
Intense laser effects on nonlinear optical absorption and optical rectification in single quantum wells under applied electric and magnetic field
Duque, C. A.; Kasapoglu, E.; Sakiroglu, S.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2011)In this work the effects of intense laser on the electron-related nonlinear optical absorption and nonlinear optical rectification in GaAs-Ga(1-x)Al(x)As quantum wells are studied under, applied electric and magnetic field. ... -
Intense laser field effect on impurity states in a semiconductor quantum well: transition from the single to double quantum well potential
Duque, C. A.; Mora-Ramos, M. E.; Kasapoglu, E.; Sari, H.; Sokmen, I. (SPRINGER, 2011)In this work are studied the intense laser effects on the impurity states in GaAs-Ga1- (x) Al (x) As quantum wells under applied electric and magnetic fields. The electric field is taken oriented along the growth direction ... -
Intense laser field effects on a Woods-Saxon potential quantum well
Restrepo, R. L.; Morales, A. L.; Akimov, V.; Tulupenko, V.; Kasapoglu, E.; Ungan, F.; Duque, C. A. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 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 in an quantum well (QW) make with Woods Saxon potential ... -
Intense laser field effects on the linear and nonlinear intersubband optical properties of a semi-parabolic quantum well
Kasapoglu, E.; Duque, C. A.; Sari, H.; Sokmen, I. (SPRINGER, 2011)By using the compact-density matrix approach, the effect of a nonresonant intense laser field on the linear and nonlinear optical absorptions based on intersubband transitions and the refractive index changes in an asymmetric ... -
Intense Laser Field Effects on the Shallow-Donor Impurity States in Rectangular-Shaped Quantum Well Wires
Duque, C. A.; Mora-Ramos, M. E.; Yesilgul, U.; Ungan, F.; Sakiroglu, S.; Kasapoglu, E.; Sari, H.; Sokmen, I. (POLISH ACAD SCIENCES INST PHYSICS, 2014)Using the effective mass and parabolic band approximations, the binding energy of a shallow donor impurity is calculated in a GaAs-(Ga,Al)As quantum well wire of rectangular transversal section, under the combined effects ... -
Intense laser field-induced nonlinear optical properties of Morse quantum well
Sakiroglu, S.; Kasapoglu, E.; Restrepo, R. L.; Duque, C. A.; Soekmen, I. (WILEY-V C H VERLAG GMBH, 2017)authoren This paper investigates the effects of an intense laser field and electric field on the optical properties of quantum well represented by Morse potential. The non-resonant, high-frequency intense laser effects ... -
Intersubband optical absorption coefficients and refractive index changes in a graded quantum well under intense laser field: Effects of hydrostatic pressure, temperature and electric field
Ungan, F.; Restrepo, R. L.; Mora-Ramos, M. E.; Morales, A. L.; Duque, C. A. (ELSEVIER SCIENCE BV, 2014)The effects of hydrostatic pressure, temperature, and electric field on the optical absorption coefficients and refractive index changes associated with intersubband transition in a typical GaAs/Ga0.7Al0.3As graded quantum ... -
Linear and nonlinear optical properties in a double inverse parabolic quantum well under applied electric and magnetic fields
Ungan, F.; Mora-Ramos, M. E.; Duque, C. A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2014)In the present work, the effects of electric and magnetic fields on the optical absorption coefficient and refractive index changes associated with intersubband transitions in a GaAs/AlxGa1-xAs double inverse parabolic ... -
Linear and nonlinear optical properties in a semiconductor quantum well under intense laser radiation: Effects of applied electromagnetic fields
Mora-Ramos, M. E.; Duque, C. A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2012)In this work we are studying the intense laser effects on the electron-related linear and nonlinear optical properties in GaAs-Ga1-xAlxAs quantum wells under applied electric and magnetic fields. The calculated quantities ... -
Linear and nonlinear optical properties in an asymmetric double quantum well under intense laser field: Effects of applied electric and magnetic fields
Yesilgul, U.; Al, E. B.; Martinez-Orozco, J. C.; Restrepo, R. L.; Mora-Ramos, M. E.; Duque, C. A.; Ungan, F.; Kasapoglu, E. (ELSEVIER SCIENCE BV, 2016)In the present study, the effects of electric and magnetic fields on the linear and third-order nonlinear optical absorption coefficients and relative change of the refractive index in asymmetric GaAs/GaAlAs double quantum ... -
Linear and nonlinear optical properties in the terahertz regime for multiple-step quantum wells under intense laser field: Electric and magnetic field effects
Restrepo, R. L.; Gonzalez-Pereira, J. P.; Kasapoglu, E.; Morales, A. L.; Duque, C. A. (ELSEVIER SCIENCE BV, 2018)We present a theoretical study on the linear and nonlinear optical properties in AlrGa1-rAs/GaAs asymmetric multiple step quantum wells (AMSQW) under the effects of a non-resonant intense laser field (ILF), electric, and ... -
Morse quantum well modulated by nonresonant intense laser field: Binding energy and optical absorption related to shallow donor impurities
Kasapoglu, E.; Sakiroglu, S.; Sari, H.; Sokmen, I.; Duque, C. A. (ELSEVIER GMBH, 2019)Binding energies of the lowest two s-symmetric impurity states and linear, third order nonlinear, and total optical absorption coefficients corresponding to the 1s -> 2s transitions for electrons in a Morse quantum well ... -
Nonlinear optical rectification and second-harmonic generation in a semi-parabolic quantum well under intense laser field: Effects of electric and magnetic fields
Ungan, F.; Martinez-Orozco, J. C.; Restrepo, R. L.; Mora-Ramos, M. E.; Kasapoglu, E.; Duque, C. A. (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2015)The effects of electric and magnetic fields on the nonlinear optical rectification and second harmonic generation coefficients related with intersubband transitions in a semi-parabolic quantum well under intense laser field ... -
Nonlinear optical rectification and the second and third harmonic generation in Poschl-Teller quantum well under the intense laser field
Sakiroglu, S.; Ungan, F.; Yesilgul, U.; Mora-Ramos, M. E.; Duque, C. A.; Kasapoglu, E.; Sari, H.; Sokmen, I. (ELSEVIER SCIENCE BV, 2012)In this work, the effect of a non-resonant intense laser field on the optical rectification and second and third harmonic generation in a Poschl-Teller quantum well is theoretically investigated. In this regard, the ...