Exciton-controlled magnetization in single magnetic quantum dots

被引：27

作者：

Mackowski, S

Gurung, T

Jackson, HE

Smith, LM

Karczewski, G

Kossut, J

机构：

[1] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2011785

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on low temperature polarization-resolved imaging of single magnetic self-assembled CdMnTe quantum dots (QDs) in the absence of magnetic field. Using longitudinal optical phonon-assisted absorption to photoexcite spin-polarized excitons into a QD ground state, we find that the magnetic impurities within CdMnTe QDs can be aligned ferromagnetically with a single emission lines exhibiting a circular polarization as large as 65%. These results demonstrate that the magnetization of a single magnetic QD can be optically controlled with a suitably polarized laser. (C) 2005 American Institute of Physics.

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页数：3

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共 12 条

[1] Monitoring statistical magnetic fluctuations on the nanometer scale -: art. no. 127201 [J].

Bacher, G ;

Maksimov, AA ;

Schömig, H ;

Kulakovskii, VD ;

Welsch, MK ;

Forchel, A ;

Dorozhkin, PS ;

Chernenko, A ;

Lee, S ;

Dobrowolska, M ;

Furdyna, JK .

PHYSICAL REVIEW LETTERS, 2002, 89 (12) :1272011-1272014

[2] Immersion lens microscopy of photonic nanostructures and quantum dots [J].

Bennett, B ;

Goldberg, S ;

Ippolito, B ;

Novotny, L ;

Liu, ZH ;

Ünlü, MS .

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2002, 8 (05) :1051-1059

[3] Optical studies of single quantum dots [J].

Gammon, D ;

Steel, DG .

PHYSICS TODAY, 2002, 55 (10) :36-41

[4] Optical probing of the spin state of a single magnetic impurity in a self-assembled quantum dot [J].

Govorov, AO .

PHYSICAL REVIEW B, 2004, 70 (03) :035321-1

[5] Subwavelength multichannel imaging using a solid immersion lens: Spectroscopy of excitons in single quantum dots [J].

Hewaparakrama, KP ;

Wilson, A ;

Mackowski, S ;

Jackson, HE ;

Smith, LM ;

Karczewski, G ;

Kossut, J .

APPLIED PHYSICS LETTERS, 2004, 85 (22) :5463-5465

[6] Growth and magneto-optical properties of sub 10 nm (Cd, Mn)Se quantum dots [J].

Kratzert, PR ;

Puls, J ;

Rabe, M ;

Henneberger, F .

APPLIED PHYSICS LETTERS, 2001, 79 (17) :2814-2816

[7] LOCALIZED EXCITON MAGNETIC POLARONS IN CD1-XMNXTE [J].

MACKH, G ;

OSSAU, W ;

YAKOVLEV, DR ;

WAAG, A ;

LANDWEHR, G ;

HELLMANN, R ;

GOBEL, EO .

PHYSICAL REVIEW B, 1994, 49 (15) :10248-10258

[8] Exciton spin relaxation in quasiresonantly excited CdTe/ZnTe self-assembled quantum dots [J].

Mackowski, S ;

Nguyen, TA ;

Gurung, T ;

Hewaparakrama, K ;

Jackson, HE ;

Smith, LM ;

Wrobel, J ;

Fronc, K ;

Kossut, J ;

Karczewski, G .

PHYSICAL REVIEW B, 2004, 70 (24) :1-9

[9] Optically-induced magnetization of CdMnTe self-assembled quantum dots [J].

Mackowski, S ;

Gurung, T ;

Nguyen, TA ;

Jackson, HE ;

Smith, LM ;

Karczewski, G ;

Kossut, J .

APPLIED PHYSICS LETTERS, 2004, 84 (17) :3337-3339

[10] Exciton spin relaxation time in quantum dots measured by continuous-wave photoluminescence spectroscopy [J].

Mackowski, S ;

Nguyen, TA ;

Jackson, HE ;

Smith, LM ;

Kossut, J ;

Karczewski, G .

APPLIED PHYSICS LETTERS, 2003, 83 (26) :5524-5526