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CdZnSe/Zn(Be)Se Quantum Dot Structures: Size, Chemical Composition and Phonons

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Abstract

The size and chemical composition of optically active CdZnSe/ZnSe and CdZnSeZZn0.97Be0.03Se quantum dots (QDs) are determined using photoluminescence, photoluminescence excitation and polarized Raman scattering spectroscopies. We show that the addition of Be into the barrier enhances the Cd composition and the quantum size effect of optically active QDs. Additionally, surface phonons from QDs are observed in CdZnSe/ZnBeSe nanostructures.

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Acknowledgments

This work is supported in part by the MRSEC Program of the National Science Foundation under Award Number DMR-0213574 (R.R and I.P.H), the Ford Foundation (R.R), New York Science and Technology on Photonic Materials and Applications and Center for Analysis of Structures and Interfaces in CUNY (X.Z, S.P.G and M.C.T)

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Authors and Affiliations

  1. Department of Applied Physics & Applied Mathematics, Columbia University, New York, NY, 10027, USA

    Y. Gu, Igor L. Kuskovsky, J. Fung, R. Robinson, I. P. Herman & G. F. Neumark

  2. Department of Chemistry, City College of CUNY, New York, NY, 10031, USA

    X. Zhou, S. P. Guo & M. C. Tamargo

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  1. Y. Gu
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  2. Igor L. Kuskovsky
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  3. J. Fung
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  4. R. Robinson
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  5. I. P. Herman
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  6. G. F. Neumark
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  7. X. Zhou
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  8. S. P. Guo
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  9. M. C. Tamargo
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Gu, Y., Kuskovsky, I.L., Fung, J. et al. CdZnSe/Zn(Be)Se Quantum Dot Structures: Size, Chemical Composition and Phonons. MRS Online Proceedings Library 799, 357–362 (2003). https://doi.org/10.1557/PROC-799-Z9.7

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  • DOI: https://doi.org/10.1557/PROC-799-Z9.7

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