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C.a. Duque – One of the best experts on this subject based on the ideXlab platform.

  • donor impurity related linear and nonlinear optical absorption coefficients in gaas ga1 xalxas concentric double quantum rings effects of geometry hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2014
    Co-Authors: H.m. Baghramyan, A A Kirakosyan, M G Barseghyan, Ricardo Restrepo, M E Moraramos, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear optical absorption associated with the transition between 1s and 2s states corresponding to the electron-donor-impurity complex in GaAs / Ga 1 − x Al x As three-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and the variation of the Aluminum Concentration, the energies of the ground and first excited s-like states of a donor impurity in such a system have been calculated using the effective mass approximation and a variational method. The energies of these states and the corresponding threshold energy of the optical transitions are examined as functions of hydrostatic pressure, Aluminum Concentration, radial impurity position, as well as the geometrical dimensions of the structure. The dependencies of the linear, nonlinear and total optical absorption coefficients as functions of the incident photon energy are investigated for different values of those mentioned parameters. It is found that the influences mentioned above lead to either redshifts or blueshifts of the resonant peaks of the optical absorption spectrum. It is particularly discussed the unusual property exhibited by the third-order nonlinear of becoming positive for photon energies below the resonant transition one. It is shown that this phenomenon is associated with the particular features of the system under study, which determine the values of the electric dipole moment matrix elements.

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  • Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1−xAlxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, and Aluminum Concentration
    Journal of Luminescence, 2014
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, Ricardo Restrepo, M.e. Mora-ramos, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear optical absorption associated with the transition between 1s and 2s states corresponding to the electron-donor-impurity complex in GaAs / Ga 1 − x Al x As three-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and the variation of the Aluminum Concentration, the energies of the ground and first excited s-like states of a donor impurity in such a system have been calculated using the effective mass approximation and a variational method. The energies of these states and the corresponding threshold energy of the optical transitions are examined as functions of hydrostatic pressure, Aluminum Concentration, radial impurity position, as well as the geometrical dimensions of the structure. The dependencies of the linear, nonlinear and total optical absorption coefficients as functions of the incident photon energy are investigated for different values of those mentioned parameters. It is found that the influences mentioned above lead to either redshifts or blueshifts of the resonant peaks of the optical absorption spectrum. It is particularly discussed the unusual property exhibited by the third-order nonlinear of becoming positive for photon energies below the resonant transition one. It is shown that this phenomenon is associated with the particular features of the system under study, which determine the values of the electric dipole moment matrix elements.

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  • linear and nonlinear optical absorption coefficients in gaas ga1 xalxas concentric double quantum rings effects of hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2013
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, R.l. Restrepo, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear intra-band optical absorption coefficients in GaAs/Ga1−xAlxAs two-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and Aluminum Concentration the energies of the ground ( n = 1 , l = 0 ) and the first excited state ( n = 2 , l = 1 ) have been found using the effective mass approximation and the transfer matrix formalism. The energies of these states and the corresponding threshold energy of the intra-band optical transitions are examined as a function of hydrostatic pressure and Aluminum Concentration for different sizes of the structure. We also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as functions of the incident photon energy for different values of hydrostatic pressure, Aluminum Concentration, sizes of the structure, and incident optical intensity. Its is found that the effects of the hydrostatic pressure and the Aluminum Concentration lead to a shifting of the resonant peaks of the intra-band optical spectrum.

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H.m. Baghramyan – One of the best experts on this subject based on the ideXlab platform.

  • donor impurity related linear and nonlinear optical absorption coefficients in gaas ga1 xalxas concentric double quantum rings effects of geometry hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2014
    Co-Authors: H.m. Baghramyan, A A Kirakosyan, M G Barseghyan, Ricardo Restrepo, M E Moraramos, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear optical absorption associated with the transition between 1s and 2s states corresponding to the electron-donor-impurity complex in GaAs / Ga 1 − x Al x As three-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and the variation of the Aluminum Concentration, the energies of the ground and first excited s-like states of a donor impurity in such a system have been calculated using the effective mass approximation and a variational method. The energies of these states and the corresponding threshold energy of the optical transitions are examined as functions of hydrostatic pressure, Aluminum Concentration, radial impurity position, as well as the geometrical dimensions of the structure. The dependencies of the linear, nonlinear and total optical absorption coefficients as functions of the incident photon energy are investigated for different values of those mentioned parameters. It is found that the influences mentioned above lead to either redshifts or blueshifts of the resonant peaks of the optical absorption spectrum. It is particularly discussed the unusual property exhibited by the third-order nonlinear of becoming positive for photon energies below the resonant transition one. It is shown that this phenomenon is associated with the particular features of the system under study, which determine the values of the electric dipole moment matrix elements.

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  • Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1−xAlxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, and Aluminum Concentration
    Journal of Luminescence, 2014
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, Ricardo Restrepo, M.e. Mora-ramos, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear optical absorption associated with the transition between 1s and 2s states corresponding to the electron-donor-impurity complex in GaAs / Ga 1 − x Al x As three-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and the variation of the Aluminum Concentration, the energies of the ground and first excited s-like states of a donor impurity in such a system have been calculated using the effective mass approximation and a variational method. The energies of these states and the corresponding threshold energy of the optical transitions are examined as functions of hydrostatic pressure, Aluminum Concentration, radial impurity position, as well as the geometrical dimensions of the structure. The dependencies of the linear, nonlinear and total optical absorption coefficients as functions of the incident photon energy are investigated for different values of those mentioned parameters. It is found that the influences mentioned above lead to either redshifts or blueshifts of the resonant peaks of the optical absorption spectrum. It is particularly discussed the unusual property exhibited by the third-order nonlinear of becoming positive for photon energies below the resonant transition one. It is shown that this phenomenon is associated with the particular features of the system under study, which determine the values of the electric dipole moment matrix elements.

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  • linear and nonlinear optical absorption coefficients in gaas ga1 xalxas concentric double quantum rings effects of hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2013
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, R.l. Restrepo, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear intra-band optical absorption coefficients in GaAs/Ga1−xAlxAs two-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and Aluminum Concentration the energies of the ground ( n = 1 , l = 0 ) and the first excited state ( n = 2 , l = 1 ) have been found using the effective mass approximation and the transfer matrix formalism. The energies of these states and the corresponding threshold energy of the intra-band optical transitions are examined as a function of hydrostatic pressure and Aluminum Concentration for different sizes of the structure. We also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as functions of the incident photon energy for different values of hydrostatic pressure, Aluminum Concentration, sizes of the structure, and incident optical intensity. Its is found that the effects of the hydrostatic pressure and the Aluminum Concentration lead to a shifting of the resonant peaks of the intra-band optical spectrum.

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Albert A. Kirakosyan – One of the best experts on this subject based on the ideXlab platform.

  • Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1−xAlxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, and Aluminum Concentration
    Journal of Luminescence, 2014
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, Ricardo Restrepo, M.e. Mora-ramos, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear optical absorption associated with the transition between 1s and 2s states corresponding to the electron-donor-impurity complex in GaAs / Ga 1 − x Al x As three-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and the variation of the Aluminum Concentration, the energies of the ground and first excited s-like states of a donor impurity in such a system have been calculated using the effective mass approximation and a variational method. The energies of these states and the corresponding threshold energy of the optical transitions are examined as functions of hydrostatic pressure, Aluminum Concentration, radial impurity position, as well as the geometrical dimensions of the structure. The dependencies of the linear, nonlinear and total optical absorption coefficients as functions of the incident photon energy are investigated for different values of those mentioned parameters. It is found that the influences mentioned above lead to either redshifts or blueshifts of the resonant peaks of the optical absorption spectrum. It is particularly discussed the unusual property exhibited by the third-order nonlinear of becoming positive for photon energies below the resonant transition one. It is shown that this phenomenon is associated with the particular features of the system under study, which determine the values of the electric dipole moment matrix elements.

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  • linear and nonlinear optical absorption coefficients in gaas ga1 xalxas concentric double quantum rings effects of hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2013
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, R.l. Restrepo, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear intra-band optical absorption coefficients in GaAs/Ga1−xAlxAs two-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and Aluminum Concentration the energies of the ground ( n = 1 , l = 0 ) and the first excited state ( n = 2 , l = 1 ) have been found using the effective mass approximation and the transfer matrix formalism. The energies of these states and the corresponding threshold energy of the intra-band optical transitions are examined as a function of hydrostatic pressure and Aluminum Concentration for different sizes of the structure. We also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as functions of the incident photon energy for different values of hydrostatic pressure, Aluminum Concentration, sizes of the structure, and incident optical intensity. Its is found that the effects of the hydrostatic pressure and the Aluminum Concentration lead to a shifting of the resonant peaks of the intra-band optical spectrum.

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  • Linear and nonlinear optical absorption coefficients in GaAs/Ga1 xAlxAs concentric double quantum rings: Effects of hydrostatic pressure and Aluminum Concentration
    Journal of Luminescence, 2013
    Co-Authors: H.m. Baghramyan, Manuk G. Barseghyan, Albert A. Kirakosyan, R.l. Restrepo, C.a. Duque

    Abstract:

    Abstract The linear and nonlinear intra-band optical absorption coefficients in GaAs/Ga1−xAlxAs two-dimensional concentric double quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and Aluminum Concentration the energies of the ground ( n = 1 , l = 0 ) and the first excited state ( n = 2 , l = 1 ) have been found using the effective mass approximation and the transfer matrix formalism. The energies of these states and the corresponding threshold energy of the intra-band optical transitions are examined as a function of hydrostatic pressure and Aluminum Concentration for different sizes of the structure. We also investigated the dependencies of the linear, nonlinear, and total optical absorption coefficients as functions of the incident photon energy for different values of hydrostatic pressure, Aluminum Concentration, sizes of the structure, and incident optical intensity. Its is found that the effects of the hydrostatic pressure and the Aluminum Concentration lead to a shifting of the resonant peaks of the intra-band optical spectrum.

    Free Register to Access Article