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Purcell effect for quantum dots placed into hybrid micropillars
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View: Figures


Image of FIG. 1.
FIG. 1.

Broadband PL emission filtered by the confined modes of a diameter pillar. The spectrum is taken at under high excitation density . The gray line shows the calculated positions of the modes assuming a FWHM of . The energy axis was shifted so that the cavity mode energies are directly comparable to experiments at in Fig. 2. The inset shows a scanning electron microscope image of the pillar.

Image of FIG. 2.
FIG. 2.

The left column presents PL spectra of isolated QDs obtained in a very low excitation regime for the three different spectral windows. The dashed lines show the calculated positions of the modes as determined in Fig. 1. Note that due to the width of the modes, some of them overlap. The right column presents the measurements of the PL decay times for labeled spectral lines.

Image of FIG. 3.
FIG. 3.

Experimental spontaneous emission enhancement factors vs the corresponding maximum calculated ones for a series of single QDs coupled, respectively, to (A) HE11, (B) EH11, HE31, and HE12, and (C) HE02, HE22, and EH22. The inset shows PL measurement performed at on a nonprocessed part of the sample to obtain the reference decay time . This value was used to determine the experimental enhancement factor.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Purcell effect for CdSe∕ZnSe quantum dots placed into hybrid micropillars