Photoluminescence measurements of InP quantum dots in pulsed magnetic fields

Provoost, R; Hayne, Manus; Zundel, M. K.; Eberl, K.; Moshchalkov, Victor

doi:10.1016/s0921-4526(98)00516-x

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…17 Such coupling is expected to be stronger in the case of dϭ2 nm, where the spacing between the top of the QDs in the first layer and the bottom of the QDs in the second layer is only ϳ2 MLs, as determined by our displacement measurements ͓Fig. 4͑b͔͒.…”

Section: Discussionmentioning

confidence: 74%

Strain distribution in self-assembled InP/GaInP quantum dots

Jin‐Phillipp¹,

Phillipp²

2000

Journal of Applied Physics

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Local strain on an atomic scale, as well as the size and the shape of InP quantum dots ͑QDs͒ embedded in GaInP, have been measured directly from high-resolution electron microscopy images. There is a strong spatial variation in strain within a QD. A large part of the misfit strain is distributed in the GaInP matrix surrounding the QDs, especially in the case of small spacing between the QD layers. The strain distribution varies significantly with the thickness of the GaInP spacer layers between QD layers. The compressive strain within the QDs decreases with decreasing spacing between the QD layers. This contributes to an increasing red shift of photoluminescence energy peak positions of QDs of multi-layers with decreasing thickness of the spacer layers between the QD layers in comparison with that of single layer QDs.

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Section: Discussionmentioning

confidence: 74%

Strain distribution in self-assembled InP/GaInP quantum dots

Jin‐Phillipp¹,

Phillipp²

2000

Journal of Applied Physics

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“…3 for NGC (filled circle) and PG (hollow circle). A linear shift of the peak to higher energy vs. external magnetic field is clearly observed for NGC and PG above 20 T. This linear shift is typical of magnetic confinement effect [9,10], when a strong magnetic field compresses electronic wave-functions in the plane perpendicular to its direction. The gain in energy related to this effect, given by Eq.…”

Section: Methodsmentioning

confidence: 72%

“…This indicates that magnetic confinement does not play an important role at such values of magnetic field and, therefore, such magnetic field dependence is a signature of spatial confinement effect. It occurs when electronic wave-functions of electrons involved in the 5 D 0 -7 F 0 transition are already spatially confined in absence of magnetic field [9,10]. The critical magnetic field B c at about 2575 T (indicated by arrow in Fig.…”

Section: Resultsmentioning

confidence: 99%