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Quadrupole effects in photoabsorption in ZnO quantum dots
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10.1063/1.4767474
/content/aip/journal/jap/112/10/10.1063/1.4767474
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/10/10.1063/1.4767474

Figures

Image of FIG. 1.
FIG. 1.

The confined energy levels , , , and for at dot radius R = 20 .

Image of FIG. 2.
FIG. 2.

The variation of transition energy for (1S-1P), (1P-1D), and (1D-1F) transitions as a function of the dot radius. Solid line: infinite confinement; dashed line: finite confinement; dotted line: tight binding (TBA); 23 solid dot: experimental data. 23

Image of FIG. 3.
FIG. 3.

The variation of linear absorption coefficient as a function of photon energy for electron in initial 1S state.

Image of FIG. 4.
FIG. 4.

The variation of linear absorption coefficient as a function of photon energy for electron in initial 2S state.

Image of FIG. 5.
FIG. 5.

The variation of linear absorption coefficient as a function of photon energy for electron in initial 1P state.

Image of FIG. 6.
FIG. 6.

The variation of linear absorption coefficient as a function of photon energy for electron in initial 1D state.

Image of FIG. 7.
FIG. 7.

The variation of photoabsorption coefficient for (1S-1P) transition at (a) R = 25 , (b) R = 30 , and (c) R = 35 at intensities I = 0.1 × 1012 W/m2, I = 0.3 × 1012 W/m2, and I = 0.5 × 1012W/m2 as a function of the incident photon energy. Dotted line: linear; dashed line: nonlinear; solid: total.

Image of FIG. 8.
FIG. 8.

The variation of photoabsorption coefficient for (2S-2P) transition at (a) R = 25 , (b) R = 30 , and (c) R = 35 at intensities I = 0.1 × 1012 W/m2, I = 0.3 × 1012 W/m2, and I = 0.5 × 1012W/m2 as a function of the incident photon energy. Dotted line: linear; dashed line: nonlinear; solid line: total.

Image of FIG. 9.
FIG. 9.

The variation of photoabsorption coefficient for (1S-1D) transition at (a) R = 25 , (b) R = 30 , and (c) R = 35 at intensities I = 0.1 × 1016 W/m2, I = 0.3 × 1016W/m2, and I = 0.5 × 1016W/m2 as a function of the incident photon energy. Dotted line: linear; dashed line: nonlinear; solid line: total.

Image of FIG. 10.
FIG. 10.

The variation of photoabsorption coefficient for (2S-2D) transition at (a) R = 25 , (b) R = 30 , and (c) R = 35 at intensities I = 0.1 × 1016W/m2, I = 0.3 × 1016 W/m2, and I = 0.5× 1016 W/m2 as a function of the incident photon energy. Dotted line: linear; dashed line: nonlinear; solid line: total.

Image of FIG. 11.
FIG. 11.

The variation of quadrupole oscillator strength versus confinement radius for the transitions ( ).

Image of FIG. 12.
FIG. 12.

The variation of quadrupole oscillator strength versus confinement radius for the transitions ( ).

Tables

Generic image for table
Table I.

Dipole oscillator strength (PD) of various transitions in ZnO QD of radius 20 Å.

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/content/aip/journal/jap/112/10/10.1063/1.4767474
2012-11-28
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Quadrupole effects in photoabsorption in ZnO quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/10/10.1063/1.4767474
10.1063/1.4767474
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