Characterization of Self-Assembled CdTe/ZnTe Quantum Dots
K. Kowalik a , A. Kudelski a , A. Golnik a , J.A. Gaj a , G. Karczewski b and J. Kossut b
a Institute of Experimental Physics, Warsaw University Hoża 69, 00-681 Warszawa, Poland
b Institute of Physics, Polish Academy of Sciences al. Lotników 32/46, 02-668 Warszawa, Poland
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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 240μeV. 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.
DOI: 10.12693/APhysPolA.103.539
PACS numbers: 78.67.Hc, 71.70.Ej