Spin polarization of excitons in nonmagnetic quantum dots induced by a neighboring magnetic semiconductor quantum well

S. Lee; K. Park; M. Dobrowolska; J. K. Furdyna

doi:10.1063/1.1669122

Spin polarization of excitons in nonmagnetic quantum dots induced by a neighboring magnetic semiconductor quantum well

S. Lee, K. Park, M. Dobrowolska, J. K. Furdyna

Department of Physics

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The spin-coupling phenomena in a structure comprised of neighboring quantum dots (QD) and quantum wells (QW) was investigated. The magneto-photoluminescence (PL) experiments were carried out on double layer structures separated by a thin ZnSe barrier layer. Circular polarization was used to detect the PL signal and the degree of PL polarization from CdSe QDs in the double layer structures was much larger than that of single layers. The results show that the spin states in the double layer structures of the nonmagnetic QDs are strongly affected by the spins of carriers in the magnetic QW layer by exchange coupling between the two systems.

Original language	English
Pages (from-to)	7184-7186
Number of pages	3
Journal	Journal of Applied Physics
Volume	95
Issue number	11 II
DOIs	https://doi.org/10.1063/1.1669122
Publication status	Published - 2004 Jun 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "The spin-coupling phenomena in a structure comprised of neighboring quantum dots (QD) and quantum wells (QW) was investigated. The magneto-photoluminescence (PL) experiments were carried out on double layer structures separated by a thin ZnSe barrier layer. Circular polarization was used to detect the PL signal and the degree of PL polarization from CdSe QDs in the double layer structures was much larger than that of single layers. The results show that the spin states in the double layer structures of the nonmagnetic QDs are strongly affected by the spins of carriers in the magnetic QW layer by exchange coupling between the two systems.",

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AU - Park, K.

AU - Dobrowolska, M.

AU - Furdyna, J. K.

PY - 2004/6/1

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N2 - The spin-coupling phenomena in a structure comprised of neighboring quantum dots (QD) and quantum wells (QW) was investigated. The magneto-photoluminescence (PL) experiments were carried out on double layer structures separated by a thin ZnSe barrier layer. Circular polarization was used to detect the PL signal and the degree of PL polarization from CdSe QDs in the double layer structures was much larger than that of single layers. The results show that the spin states in the double layer structures of the nonmagnetic QDs are strongly affected by the spins of carriers in the magnetic QW layer by exchange coupling between the two systems.

AB - The spin-coupling phenomena in a structure comprised of neighboring quantum dots (QD) and quantum wells (QW) was investigated. The magneto-photoluminescence (PL) experiments were carried out on double layer structures separated by a thin ZnSe barrier layer. Circular polarization was used to detect the PL signal and the degree of PL polarization from CdSe QDs in the double layer structures was much larger than that of single layers. The results show that the spin states in the double layer structures of the nonmagnetic QDs are strongly affected by the spins of carriers in the magnetic QW layer by exchange coupling between the two systems.

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