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Investigation of large Stark shifts in InGaN/GaN multiple quantum wells
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10.1063/1.4775605
/content/aip/journal/jap/113/3/10.1063/1.4775605
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4775605
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) PL spectra of InGaN/GaN MQWs at different excitation fluences, and (b) PL peak energy as a function of excitation fluence at 4.5 K. Dots are experimental data, and dashed curve in (b) is for eye-guide purpose. The inset is simulated conduction band edges for QWs at three different excitation levels.

Image of FIG. 2.
FIG. 2.

PL peak energy vs. fluence density, measured at room temperature. Solid curve was obtained after smoothing the lines connecting adjacent data points to show major features of the dependence.

Image of FIG. 3.
FIG. 3.

(a) Time-integrated PL intensity and (b) linewidths of PL spectra as a function of excitation fluence density at the temperature of 4.5 K. Dots are experimental data, and dashed curves are for eye-guide purpose. The inset shows the PL integration under very low excitation fluence, and solid line is linear fitting for experimental data.

Image of FIG. 4.
FIG. 4.

Arrhenius plots of time-integrated PL intensity for excitation fluence of (a) 13.9 μJ/cm2, (b) 0.28 mJ/cm2, and (c) 22.3 mJ/cm2. Dots are experimental data and solid curves are fitting results by using Eq. (1) . And (d) temperature-dependent PL spectra at excitation fluence of 22.3 mJ/cm2.

Image of FIG. 5.
FIG. 5.

PL peak energy (left column) and linwidth of PL spectra (right column) as a funtion of temperature for three excitation levels. The corresponding excitation fluence is indicated in figures. Dashed curves were obtained after smoothing the lines connecting adjacent data points to show major features of the dependence.

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/content/aip/journal/jap/113/3/10.1063/1.4775605
2013-01-17
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Investigation of large Stark shifts in InGaN/GaN multiple quantum wells
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4775605
10.1063/1.4775605
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