Magneto-luminescence of quasi-zero dimensional In0:25Ga0:75As/GaAs quantum dots
نویسندگان
چکیده
We report photoluminescence measurements on In0:25Ga0:75As/GaAs quantum well and dots grown on (1 1 1)B GaAs substrate in high magnetic ®elds up to 45 Tesla. A well-de®ned PL line with full width at half maximum of approximately 5.5 meV is observed. From an analysis of the zero ®eld transition energy, we point out the importance of an internal piezoelectric ®eld. By analyzing the diamagnetic shift of the PL in both Faraday and Voigt con®gurations, the optical characteristics of a quasi-zero dimensional exciton are discussed. Ó 1998 Elsevier Science B.V. All rights reserved.
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