Optical properties of (In,Ga)As capped InAs quantum dots grown on [11k] substrates

Details Optical properties of (In,Ga)As capped InAs quantum dots grown on [11k] substrates Optical properties of (In,Ga)As capped InAs quantum dots grown on [11k] substrates

2007-04-18

arxiv.org/abs/0704.2300v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.2753745

Using three-dimensional k.p calculation including strain and piezoelectricity, we showed that the size of the quantum dot (QD) in the growth direction determines the influence of the (In,Ga)As capping layer on the optical properties of [11k] grown InAs QDs, where k=1,2,3. For flat dots, increase of In concentration in the capping layer leads to a decrease of the transition energy, as is the case of [001] grown QDs, whereas for large dots an increase of the In concentration in the capping layer is followed by an increase of the transition energy up to a critical concentration of In, after which the optical transition energy starts to decrease.

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