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Photoluminescence of individual doped nanofabricated quantum dots
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) spectrum (filled circles) of a single dry-etched quantum dot (QD) of geometrical diameter at . The power density is that corresponds to an average of electron-hole pairs created per pulse (Ref. 19). The red line shows the result of a fitting analysis with a Lorentzian function. Inset: Plot of the integrated PL intensity with temperature changes (black squares). The red line corresponds to an activation energy of . (b) SEM image of the array composed by QD replica (c) of QDs separated by and (d) of one dry-etched QD.

Image of FIG. 2.
FIG. 2.

(Color online) spectrum of a single quantum dot of geometrical diameter (upper spectrum), (middle spectrum), and of the quantum-well emission (lower spectrum) at . Red lines show the results of a fitting analysis with a single Lorentzian function. Inset: Energy shift of the QD emissions from the quantum-well emission for different QD diameters .

Image of FIG. 3.
FIG. 3.

(Color online) (a) spectra of a single dry-etched quantum dot of geometrical diameter as a function of power density. The red lines are the two Lorentzian lines used for the fitting analysis. Inset: integrated intensity of the high-energy (, black triangles) and low-energy (, red squares) peaks as a function of the power density. The solid lines represent the linear (, black line) and quadratic (, red line) intensity dependences on the power density. (b) Temperature dependence of the -photoluminescence spectrum of a single quantum dot. The arrow indicates the energy position of the biexcitonic peak. The power density is .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoluminescence of individual doped GaAs∕AlGaAs nanofabricated quantum dots