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InSb Quantum Dots in an InAsSb Matrix Grown by Molecular Beam Epitaxy

100%

Semenov A., Solov'ev V., Meltser B., Lyublinskaya O., Terent'ev Y., Sitnikova A., Ivanov S.

Acta Physica Polonica A

2005

vol. 108

issue 5

859-865

We report on molecular beam epitaxy of InSb insertions in InAs and InAsSb matrices, emitting at wavelengths beyond 4μm. Different growth techniques for deposition of InSb quantum dots in the 1-2 monolayer range of the InSb nominal thickness, namely conventional molecular beam epitaxy and migration enhanced epitaxy, as well as different matrices (InAs and InAsSb) have been employed for increasing the emission wavelength of the InSb/InAs nanostructures. The formation of InSb quantum dots has been studied in situ using reflection high energy electron diffraction and ex situ by using transmission electron microscopy. The peculiarities of In(Ga)AsSb alloys growth and compositional control are also discussed. Bright photoluminescence up to 4.5μm has been observed at 80 K.

Magneto-Optical Studies of Narrow Band-Gap Heterostructures with Type II Quantum Dots InSb in an InAs Matrix

84%

Mukhin M., Terent'ev Y., Golub L., Nestoklon M., Meltser B., Semenov A., Solov'ev V., Sitnikova A., Toropov A., Ivanov S.

Acta Physica Polonica A

2011

vol. 120

issue 5

868-869

Magneto-optical properties of type II heterostructures with InSb/InAs quantum dots has been studied at external magnetic field applied in the Faraday geometry. The emission polarization degree can be changed in the range from 100% σ-minus to 10% σ-plus due to excitation intensity and temperature variation. The detailed calculation of the band structure within a tight-binding approximation is presented. The simulation of the experimental data reveals that the oscillator strength of the optical transitions involving electrons with the spin oriented along and opposite to the magnetic field vector differs by approximately 1.8 times in the heterostructures under study.

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2 Acta Physica Polonica A

1 2011

1 2005

2 Ivanov S.

2 Meltser B.

2 Semenov A.

2 Sitnikova A.

2 Solov'ev V.

2 Terent'ev Y.

1 Golub L.

1 Lyublinskaya O.

1 Mukhin M.

1 Nestoklon M.

1 Toropov A.

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InSb Quantum Dots in an InAsSb Matrix Grown by Molecular Beam Epitaxy

Magneto-Optical Studies of Narrow Band-Gap Heterostructures with Type II Quantum Dots InSb in an InAs Matrix