The polarizability and the photoionization cross‐section under the external fields for donor impurities in quantum well‐wire

Köksal, M.; Kasapoğlu, E.; Sarı, H.; Sökmen, I.

doi:10.1002/pssc.200673289

Cited by 2 publications

(1 citation statement)

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“…Lax 1 was the one who first investigated the photoionization cross-section of hydrogenic impurities in bulk semiconductors. Photon energy depended photoionization cross section has been studied earlier for bulk semiconductors, 2 quantum wells, 3 4 quantum well wires [5][6][7] and quantum dots. 8 9 In all the studies they found that the photoionization cross section depended upon the * Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Photoionization of Charged Exciton in a Double Quantum Well Heterostructure in the Influence of Electric Field

Angayarkanni¹,

Lee²,

Peter³

2011

j comput theor nanosci

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Binding energy of charged exciton is investigated in a GaAs/GaAlAs double quantum well system in the presence of magnetic and electric field applied in the z direction. Calculations have been carried out with the variational technique within the single band effective mass approximations using a two parametric trial wave function. The photoionization cross section for a charged exciton placed at the centre of quantum well is computed as a function of normalized photon energy in the presence of magnetic and electric field strengths. The interband emission energy as a function of well width is calculated. The dependence of the photoionization cross section on photon energy is carried out for the charged excitons. The resulting spectra are brought out for light polarized along and perpendicular to the growth direction. The results show that the charged exciton binding energy, interband emission energy and the photoionization cross section depend strongly on the well width. Our results are compared with the other existing literature available.

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Section: Introductionmentioning

confidence: 99%