Micro-photoluminescence study of electron-spin injection in self-assembled semiconductor quantum dots |
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Authors: | K Hyomi |
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Institution: | Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan |
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Abstract: | We present a micro-photoluminescence (m-PL) study of electron-spin injection under magnetic fields in self-assembled semiconductor quantum dots (QDs) of CdSe. A characteristic band line-up of the CdSe QDs coupled with a diluted magnetic semiconductor quantum well (DMS-QW) of ZnCdMnSe through a ZnSe barrier layer enabled us to inject the electron spins from the DMS-QW into QDs. An experimental evidence of the electron-spin injection was provided by observations of circularly polarized m-PL spectra from individual QDs in this coupled QD structure. We find anti-correlation of PL intensity in between the DMS-QW (spin injector) and the individual QDs (spin receiver). |
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Keywords: | 78 47 +p 78 55 Et 78 67 Hc |
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