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Characterization of Self-Assembled CdTe/ZnTe Quantum Dots

100%

Kowalik K., Kudelski A., Golnik A., Gaj J., Karczewski G., Kossut J.

Acta Physica Polonica A

2003

vol. 103

issue 6

539-544

We present microluminescence investigations of self-assembled CdTe/ZnTe quantum dots. The dots proprieties resulting from our studies are: values of optical in-plane anisotropy parameters (electron - heavy hole exchange splitting and orientation of anisotropy) and value of effective Lande factor. Parameters giving information about in-plane anisotropy possess random distribution of values with the exchange splitting from 0 to 240 μeV. The effective Lande factor values for our dots are around g^*=-3.2 with a scatter of about 18%. Some PL lines exhibit sudden jumps of energetic position, related to variation of the charge state in their neighborhood.

Influence of an Electric Field on Fine Properties of III-V and II-VI Quantum Dots Systems

84%

Kowalik K., Krebs O., Kudelski A., Golnik A., Lemaître A., Senellart P., Karczewski G., Kossut J., Gaj J., Voisin P.

Acta Physica Polonica A

2004

vol. 106

issue 2

177-184

We investigate the influence of an electric field on the optical properties of single quantum dots. For sample made of III-V compounds micron-size electro-optical structures were produced in order to apply an electric field in the dot plane. For several individual dots lines significant variations of the anisotropic exchange splitting with the field were observed. On sample made of II-VI compounds we demonstrate the influence of electric field fluctuations on the luminescence of a single quantum dot.

Control of Photon Polarization in GaAs/AlAs Single Quantum Dot Emission

68%

Suffczyński J., Trajnerowicz A., Kazimierczuk T., Piętka B., Kowalik K., Kossacki P., Golnik A., Nawrocki M., Gaj J., Wysmołek A., Stępniewski R., Potemski M., Thierry-Mieg V.

Acta Physica Polonica A

2007

vol. 112

issue 2

461-466

We study polarization resolved correlation between photons emitted in cascaded biexciton-exciton recombination from a single quantum dot formed in type II GaAs/AlAs bilayer. Magnetic field induced transition from anisotropy controlled to the Zeeman controlled emission was demonstrated by a circular polarization correlation between the emitted photons. A simple model describing the effect allowed us to determine the anisotropic exchange splitting of the excitonic state. This method of the anisotropic exchange splitting determination can be useful in the case when other methods are not sensitive enough.

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3 Acta Physica Polonica A

1 2007

1 2004

1 2003

3 Gaj J.

3 Golnik A.

3 Kowalik K.

2 Karczewski G.

2 Kossut J.

2 Kudelski A.

1 Kazimierczuk T.

1 Kossacki P.

1 Krebs O.

1 Lemaître A.

1 Nawrocki M.

1 Piętka B.

1 Potemski M.

1 Senellart P.

1 Stępniewski R.

1 Suffczyński J.

1 Thierry-Mieg V.

1 Trajnerowicz A.

1 Voisin P.

1 Wysmołek A.

Search results

Characterization of Self-Assembled CdTe/ZnTe Quantum Dots

Influence of an Electric Field on Fine Properties of III-V and II-VI Quantum Dots Systems

Control of Photon Polarization in GaAs/AlAs Single Quantum Dot Emission