Binding energy of excitons in parabolic quantum wells in uniform electric and magnetic fields

Taqi, Ahmed; Diouri, J.

doi:10.15407/spqeo15.01.021

Cited by 2 publications

(3 citation statements)

References 11 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structures with parabolic confinement have attracted more attention in the recent decades (for example, Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]). In typical (narrow) quantum wells (QW) with the dimension of, say, one excitonic Bohr radius in the growth direction we observe only a few excited states.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Excitonic spectra of wide parabolic quantum wells

2015

View full text Add to dashboard Cite

Abstract. The optical properties of wide quantum wells are considered, taking into account the screened electron-hole interaction potential and parabolic confinement potentials, different for the electrons and for the holes. The role of the interaction potential which mixes the energy states according to different quantum numbers is stressed. The results obtained by our method are in agreement with the observed spectra and give the possibility to the assessment of the resonances.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The structures with parabolic confinement have attracted more attention in the recent decades (for example, Ref. [1]- [15]).…”

Section: Introductionmentioning

confidence: 99%

Excitonic spectra of wide parabolic quantum wells

2015

View full text Add to dashboard Cite

show abstract

“…In most of these nanostructures the applied electric field causes a red-shift of the positions of the lowest energy states, changes in the exciton binding energy, and lowering the oscillator strengths of the resonances. Here we consider QCSE in wide parabolic quantum wells (WPQWs), of thicknesses in the growth direction of the order of a few excitonic Bohr radii of the well material (see, for example [39][40][41]43], and references therein). The optical spectra of WPQWs show a large number of resonances, which are due to the transitions between confined states.…”

Section: Introductionmentioning

confidence: 99%

Quantum confined stark effect in wide parabolic quantum wells: real density matrix approach

2015

View full text Add to dashboard Cite

Abstract.We show how to compute the optical functions of wide parabolic quantum wells (WPQWs) exposed to uniform electric F applied in the growth direction, in the excitonic energy region. The effect of the coherence between the electron-hole pair and the electromagnetic field of the propagating wave including the electron-hole screened Coulomb potential is adopted, and the valence band structure is taken into account in the cylindrical approximation. The role of the interaction potential and of the applied electric field, which mix the energy states according to different quantum numbers and create symmetry forbidden transitions, is stressed. We use the real density matrix approach (RDMA) and an effective e-h potential, which enable to derive analytical expressions for the WPQWs electrooptical functions. Choosing the susceptibility, we performed numerical calculations appropriate to a GaAs/GaAlAs WPQWs. We have obtained a red shift of the absorption maxima (quantum confined Stark effect), asymmetric upon the change of the direction of the applied field (F → −F), parabolic for the ground state and strongly dependent on the confinement parameters (the QWs sizes), changes in the oscillator strengths, and new peaks related to the states with different parity for electron and hole.

show abstract

Binding energy of excitons in parabolic quantum wells in uniform electric and magnetic fields

Cited by 2 publications

References 11 publications

Excitonic spectra of wide parabolic quantum wells

Excitonic spectra of wide parabolic quantum wells

Quantum confined stark effect in wide parabolic quantum wells: real density matrix approach

Contact Info

Product

Resources

About