Photoluminescence Studies on Self-Organized InAlAs/AlGaAs Quantum Dots under Pressure

Phillips, Jamie; Bhattacharya, P.; Venkateswaran, U. D.

doi:10.1002/(sici)1521-3951(199901)211:1<85::aid-pssb85>3.0.co;2-0

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…Then the height of the potential barrier for shallow donor impurities as a function of Al concentration x and the hydrostatic pressure is given by V 0 (P) = 0.6 E g (x, P); (15) here we consider the Al concentration equal to x = 0.30. With these variations the donor binding energy is obtained, for different pressures and dot sizes, using the variational method within the effective mass approximation.…”

Section: Theorymentioning

confidence: 99%

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Hydrostatic-pressure effects on the donor binding energy in GaAs–(Ga, Al)As quantum dots

Pérez-Merchancano¹,

Paredes-Gutierrez²,

Silva–Valencia³

2006

J. Phys.: Condens. Matter

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The binding energy of shallow hydrogenic impurities in a spherical quantum dot under isotropic hydrostatic pressure is calculated using a variational approach within the effective mass approximation. The binding energy is computed as a function of hydrostatic pressure, dot size and impurity position. The results show that the impurity binding energy increases with the pressure for any position of the impurity. Also, we have found that the binding energy depends on the location of the impurity and the pressure effects are less pronounced for impurities on the edge.

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Section: Theorymentioning

confidence: 99%

“…Photoluminescence studies of self-organized InAlAs/AlGaAs quantum dots under pressure were carried out by Phillips et al [15]. The effect of hydrostatic pressure on the optical transitions in self-assembled InAs/GaAs quantum dots was studied by Duque et al [16].…”

Section: Introductionmentioning

confidence: 99%

Hydrostatic-pressure effects on the donor binding energy in GaAs–(Ga, Al)As quantum dots

Pérez-Merchancano¹,

Paredes-Gutierrez²,

Silva–Valencia³

2006

J. Phys.: Condens. Matter

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Binding energy of heavy excitons in spherical quantum dots under hydrostatic pressure

Moscoso-Moreno

Franco

Silva–Valencia

2009

Physica Status Solidi (b)

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The binding energy of heavy hole excitons in a spherical GaAs–Ga1–x Alx As quantum dot under isotropic hydrostatic pressure was calculated using the Hylleraas coordinate system and a variational approach within the approximation of the effective mass. The influences of hydrostatic pressure on the effective masses of the electron and the heavy hole, the dielectric constant and the conduction‐ and valence‐band offsets between the well and the barriers are taken into account in the calculation. The binding energy is computed as a function of hydrostatic pressure, the dot sizes and the Al(x) concentration. The results show that the binding energy derived from exciton increases with the pressure, especially for small quantum dots. Also, we have found that the binding energy increases with the pressure and the concentration for a fixed quantum dot radius, which can be useful for technological applications. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Study of optical properties in a cubic quantum dot

et al. 2011

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In this paper, the effect of hydrostatic pressure on both the intersubband optical absorption coefficients and the refractive index changes is studied for typical GaAs/Al x Ga 1−x As cubic quantum dot. We use analytical expressions for the linear and third-order nonlinear intersubband absorption coefficients and refractive index changes obtained by the compactdensity matrix formalism. The linear, third-order nonlinear, and total intersubband absorption coefficients and refractive index changes are calculated at different pressures as a function of the photon energy with known values of box length (L), the incident optical intensity (I ), and Al concentration (x). According to the results obtained from the present work, we have found that the pressure plays an important role in the intersubband optical absorption coefficient and refractive index changes in a cubic quantum dot.

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Photoluminescence Studies on Self-Organized InAlAs/AlGaAs Quantum Dots under Pressure

Cited by 12 publications

References 9 publications

Hydrostatic-pressure effects on the donor binding energy in GaAs–(Ga, Al)As quantum dots

Hydrostatic-pressure effects on the donor binding energy in GaAs–(Ga, Al)As quantum dots

Binding energy of heavy excitons in spherical quantum dots under hydrostatic pressure

Study of optical properties in a cubic quantum dot

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