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Narrow inhomogeneous broadening of V-groove quantum wires grown on vicinal substrates
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10.1063/1.2976555
/content/aip/journal/apl/93/17/10.1063/1.2976555
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/17/10.1063/1.2976555
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Orientation of the QWR with respect to the crystallographic axes and definition of the alignment and miscut angles. (b) Illustration of the different morphologies of the and (001) facets. (c) Schematic discontinuity between the QWR segments induced by a misalignment to the direction or by a substrate tilted from the (001) plane toward the direction.

Image of FIG. 2.
FIG. 2.

(a) 10 K excited PL spectra of three pairs of QWR samples grown with different nominal thicknesses, either on or (001) substrates. The energy scale is reported relatively to the peak energy of each spectrum. Continuous lines are best fits to the data. (b) 10 K Ti:sapphire excited PL and PLE (two polarizations) spectra measured for 4 nm thick QWRs. The first transitions between electrons and holes states are labeled.

Image of FIG. 3.
FIG. 3.

(a) FWHM of the 2 nm thick QWR samples as a function of the miscut angle of the substrate. Different points correspond to positions several millimeters apart on the samples. Inset: 10 K PLE spectra of the sample. (b) Temperature dependence of spectra measured on nominally exact or samples ( excitation, ).

Image of FIG. 4.
FIG. 4.

AFM top images of V-groove QWR samples grown on substrates with different (001) miscuts: (a) height profiles measured across the V-grooves; (b) AFM amplitude images; (c) height profiles along the top- facets of the grooves, acquired along the indicated lines.

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/content/aip/journal/apl/93/17/10.1063/1.2976555
2008-10-30
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Narrow inhomogeneous broadening of V-groove quantum wires grown on vicinal substrates
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/17/10.1063/1.2976555
10.1063/1.2976555
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