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Resonant optical excitation of longitudinal-optical phonons and intermixing in single quantum dots
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View: Figures


Image of FIG. 1.
FIG. 1.

Resonantly (, black) and nonresonantly (, blue) excited PL. The marked peaks are the exciton , biexciton , and probably trion of the same QD. The PLE spectrum of (red curve) shows phonon resonances at 31, 41, 51, and .

Image of FIG. 2.
FIG. 2.

Polarization resolved PL spectra for varying excitation energies. Left and right panel show the linearly counterpolarized exciton states and , respectively. Bottom panel: the fine structure split exciton lines and resonate for excitation at above the respective emission lines.

Image of FIG. 3.
FIG. 3.

Intensity scale plot of the PL versus excitation and detection energy. The dotted line is below the laser energy. Notice that also the trion resonates at the same excess energy.

Image of FIG. 4.
FIG. 4.

Polarization resolved PL spectra for excitation near the exciton resonance. Both , exciton states can mostly be observed for polarized excitation, indicating a doubly resonant process.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Resonant optical excitation of longitudinal-optical phonons and intermixing in InAs∕AlAs single quantum dots