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Laser emission with excitonic gain in a ZnO planar microcavity
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10.1063/1.3593032
/content/aip/journal/apl/98/21/10.1063/1.3593032
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/21/10.1063/1.3593032
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Photoluminescence at and a detection angle of 0°, as a function of the excitation power density ( per pulse); the LPB and the lasing mode (L) are indicated. [(b) and (c)] Amplitude and energy of the two observed transitions.

Image of FIG. 2.
FIG. 2.

[(a)–(c)] Photoluminescence recorded at 0° as a function of the excitation power density for various temperature and detuning conditions; the excitation power density increases from to , similarly to Fig. 1. The LPB, lasing mode (L), gain feature (G), polariton mode and exciton energy (X) are indicated; the expected uncoupled cavity mode is also shown for (c). [(d) and (e)] Angle-resolved photoluminescence spectra below and above the lasing threshold, in the same conditions as in (a); the PL intensity is represented in a logarithmic color scale. The dispersion of uncoupled photon and exciton modes are indicated as dotted lines; the dashed lines represent the polariton modes obtained from a coupled oscillator model; the gain feature appears as dashed-dotted line.

Image of FIG. 3.
FIG. 3.

Energies (symbols) of the observed transitions as a function of temperature: LPB, lasing mode (L), gain feature (G), polariton mode , and exciton (X); the Varshni law for zinc oxide excitons and the reported values for the gain feature (Ref. 12) are shown as plain lines.

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/content/aip/journal/apl/98/21/10.1063/1.3593032
2011-05-23
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Laser emission with excitonic gain in a ZnO planar microcavity
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/21/10.1063/1.3593032
10.1063/1.3593032
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