Photoluminescence and magnetophotoluminescence of circular and elliptical InAs/GaAs quantum dots

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Authors	KULDOVÁ Karla KŘÁPEK Vlastimil HOSPODKOVÁ Alice BONAVENTUROVÁ ZRZAVECKÁ Olga OSWALD Jiří HULICIUS Eduard HUMLÍČEK Josef
Year of publication	2006
Type	Article in Periodical
Magazine / Source	Materials Science & Engineering C-Biomimetic and Supramolecular Systems
MU Faculty or unit	Faculty of Science
Citation
Field	Solid matter physics and magnetism
Keywords	quantum dots; InAs/GaAs; magnetophotoluminescence
Description	Photoluminescence, magnetophotoluminescence, and atomic force microscopy were used for the characterization of MOVPE prepared InAs/GaAs quantum dots. Significant differences in the behaviour of the first excited photoluminescence transition in magnetic field are explained by the different lateral shape of quantum dots. While the first excited luminescence peak of circular quantum dots splits with increasing magnetic field into two peaks, no splitting occurs for quantum dots with elliptic shape, only small red shift is observed. Theoretical calculations of energy levels in InAs/GaAs quantum dots with circular and elliptical shape with different elongations are presented and compared with experimental results.
Related projects:	Physical and chemical properties of advanced materials and structures