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Narrow inhomogeneous broadening and its correlation with confinement potential of pyramidal quantum dot arrays
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10.1063/1.2772178
/content/aip/journal/apl/91/8/10.1063/1.2772178
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/8/10.1063/1.2772178
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Representative cathodoluminescence spectra showing the QD transitions of samples A–D, measured at , at acceleration voltage of , and beam current of . Arrows denote the ground state transitions, and the shaded area depicts the energy of the lowest subband transition in the VQWR barrier.

Image of FIG. 2.
FIG. 2.

Histograms showing the distribution of emission energies for samples A–D. Solid lines are Gaussian fits to the data. The quoted errors in the FWHM correspond to differences in the Gaussian fits that were obtained when different binning intervals were chosen for the histograms of the emission energy distribution.

Image of FIG. 3.
FIG. 3.

(Color online) Variations of the FWHM (left ordinate, squares) and the corresponding estimated thickness variations in monolayers (±, right ordinate, triangles), versus dot height for samples A–D. The dotted and dashed lines connecting the FWHM and , respectively, are a guide to the eye. The error bars are statistical errors and derive directly from the errors in the FWHM given in Fig. 2. The inset shows the calculated -state energies (solid line) and the CL -state emission energies (dots) as a function of dot height.

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/content/aip/journal/apl/91/8/10.1063/1.2772178
2007-08-20
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Narrow (≈4meV) inhomogeneous broadening and its correlation with confinement potential of pyramidal quantum dot arrays
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/8/10.1063/1.2772178
10.1063/1.2772178
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