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Visible-wavelength laser action of multiple quantum well structures
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Annealing of ZnCdO. RHEED patterns of a -thick epilayer taken along the azimuth: (a) as grown and (b) annealed for at . (c) Pattern of a single QW structure with a well width of and a -thick ZnO cap after rise of the temperature from to . (d) Photoluminescence of a -thick single QW well structure before (dashed) and after (full) annealing at . Excitation is with the frequency tripled output of a laser.

Image of FIG. 2.
FIG. 2.

(Color online) Emission from a MQW structure grown on -plane sapphire. Temperature is . Upper panel: spontaneous emission taken in backward geometry. Lower panel: laser action observed from the sample edges at the same . Inset: lasing threshold.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Variation of the laser emission with structure design, 1–4 are sapphire substrates and 5 is ZnO substrate. (b) Change of the laser emission from low to room temperature for structure 2. Inset: temperature dependence of the threshold, line is to guide the eye.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Visible-wavelength laser action of ZnCdO∕(Zn,Mg)O multiple quantum well structures