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Formation and optical properties of stacked CdSe self-assembled quantum dots on barriers
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10.1116/1.2200383
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    Affiliations:
    1 Department of Chemistry, The City College of City University of New York, 138th Street and Convent Avenue, New York, New York 10031 and Graduate Center of City University of New York, 365 Fifth Avenue, New York, New York 10016
    2 Department of Chemistry, The City College of City University of New York, 138th Street and Convent Avenue, New York, New York 10031
    3 Department of Chemistry, The City College of City University of New York, 138th Street and Convent Avenue, New York, New York 10031 and Graduate Center of City University of New York, 365 Fifth Avenue, New York, New York 10016
    a) Electronic mail: perezpaz@sci.ccny.cuny.edu
    b) Electronic mail: mtamargo@ccny.cuny.edu
    J. Vac. Sci. Technol. B 24, 1649 (2006); http://dx.doi.org/10.1116/1.2200383
/content/avs/journal/jvstb/24/3/10.1116/1.2200383
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/24/3/10.1116/1.2200383
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(400) DCXRD spectrum of a superlattice with a band gap energy of and 59% of MgSe content in the barrier layer. The solid line represents the experimental data, while the dashed line shows the dynamic simulation data obtained by a Bede RADS mercury x-ray software.

Image of FIG. 2.
FIG. 2.

[400] DCXRD spectrum from a detail of the fringes derived from the InGaAs buffer layer. The circle in Fig. 1 indicates the portion of the spectrum that has been investigated in more detail.

Image of FIG. 3.
FIG. 3.

Photoluminescence spectra of the two sets of 30 MQD samples grown with the same CdSe nominal thickness of 2 MLs and different . (a) Five samples grown with a Mg content of 59% in the barrier. (b) Four samples grown with a Mg content of 35% in the barrier. The is indicated besides the PL spectrum of the corresponding sample. PL spectra of SQD samples grown under the same conditions as the MQD structures are represented in dashed lines for both cases.

Image of FIG. 4.
FIG. 4.

Linearly polarized spectra for three representative samples in the two configurations: edge and surface. MQD samples have a spacer deposition time of (a) (coupled), (b) (uncoupled) and (c) (weak coupled). TE polarized light is always represented by dashed lines, while TM is represented by solid lines.

Image of FIG. 5.
FIG. 5.

Three dimensional AFM image of the uncapped MQD structure. The sample was grown with the same spacer thickness than an uncoupled-QD situation.

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/content/avs/journal/jvstb/24/3/10.1116/1.2200383
2006-05-31
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Formation and optical properties of stacked CdSe self-assembled quantum dots on ZnxCdyMg1−x−ySe barriers
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/24/3/10.1116/1.2200383
10.1116/1.2200383
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