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Recombination dynamics and lasing in single quantum well structures
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) PL spectra measured in SQWs of different widths. “QW,” “B,” and “ZnO” denote emission from the well, barrier, and ZnO interface layer, respectively. The Mg content is 12% in the 1.5 and QWs and 14% in the QW. The inset presents a calculated well-width dependence of the exciton energy shown together with experimental PL (squares) and PLE (stars) data. (b) PL decay curves corresponding to the QW and B peaks. The dotted lines are fits done with the following fast and slow times, (ns): QW , B ; QW , B ; QW , B .

Image of FIG. 2.
FIG. 2.

(a) PL (1) and PLE (2) spectra measured in a SQW DHS. The room temperature PLE spectrum is monitored from the “green” PL peak for the sake of better resolution. (b) RT spectra of stimulated emission measured at the excitation power density (from bottom to top): 436, 674, 872, and . The inset presents the PL intensity dependence on the excitation power.

Image of FIG. 3.
FIG. 3.

(Color online) TRPL images [(a) and (b)] and selected decay curves [(c) and (d)] recorded in the 3 and SQW DHSs at the wavelengths marked as B, FX, and LX in the images. For the well they correspond to: B , FX , and LX .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Recombination dynamics and lasing in ZnO∕ZnMgO single quantum well structures