Exciton absorption in quantum-well wires under the electric field

Kasapoğlu, E.; Sarı, H.; Bursal, Murat; Sökmen, I.

doi:10.1016/s1386-9477(02)00671-9

Cited by 42 publications

(20 citation statements)

References 24 publications

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“…This consists of the existence of quasi-bound states (instead of bound states), if the electric field is strong enough and it is applied over a distance larger than the QD radius. For example, there exist calculation models in quantum wells [20] and quantum wires [21] which assume a potential term in the Hamiltonian qFz for all z, in which the authors fail to notice or to mention that they are dealing with quasi-bound states.…”

Section: Resultsmentioning

confidence: 99%

Comparison of electric field effects on carriers between spherical quantum dots and cylindrical quantum wires

Castillo-Mussot

Vázquez

Mendoza

et al. 2005

phys. stat. sol. (c)

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We investigate the effect of an electric field applied to two systems; a spherical quantum dot and a cylindrical quantum wire. In the latter system the field is applied perpendicular to the cylinder axis. We are interested on the energy ground state of carriers in the quantum dot and wire using an infinite confining potential well model. We perform a variational calculation for both systems and for low electric fields we find a quadratic shift of the energy levels with the electric field. For strong fields the Stark shift of the energy groundstate increases almost linearly with the electric field. In order to compare the results of both systems, we choose the radii of the sphere and the cylinder to be equal. For same radii the Stark shift of the sphere is smaller than that of the cylinder.

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Section: Resultsmentioning

confidence: 99%

Comparison of electric field effects on carriers between spherical quantum dots and cylindrical quantum wires

Castillo-Mussot

Vázquez

Mendoza

et al. 2005

phys. stat. sol. (c)

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show abstract

“…This consists of the existence of quasi-bound states (instead of bound states), if the electric field is strong enough and it is applied over a distance larger than the QD radius. For example, there exist calculation models in quantum wells [12] and quantum wires [13] that assume a potential term in the Hamiltonian qFz for all z, in which the authors fail to notice or to mention that they are dealing with quasi-bound states.…”

Section: Resultsmentioning

confidence: 99%

Spherical quantum dot under an electric field

Vázquez

Castillo-Mussot

Mendoza

et al. 2004

phys. stat. sol. (c)

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PACS 73.21.LaWe investigate the effect of an electric field applied to a spherical quantum dot on the energy groundstate of carriers in the quantum dot using an infinite confining potential well model. We perform a simple variational calculation for low electric fields and we find a quadratic shift of the energy levels with the electric field while for strong fields, the Stark shift of the energy groundstate increases almost linearly with the electric field. There is a transition for quasi-one dimensional to three-dimensional behavior when the dot radius is large. The comparison of our results with previous exact calculations is very good.

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“…We have also used the same method in our previous study for exciton absorption in QWWs under the electric field [26]. The final state in the form of a wave packet summed over Slater determinants for NÀ1 electrons in the valance band and one electron in the conduction subband.…”

Section: Article In Pressmentioning

confidence: 99%