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Effects of pumping on propagation velocities of confined exciton polaritons in double heterostructure thin films under resonant and non-resonant probe conditions
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10.1063/1.4772717
/content/aip/journal/jap/113/1/10.1063/1.4772717
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/1/10.1063/1.4772717
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of cross-correlation measurement system. A slit and grating pair are used to control the spectrum of the probe beam. The intensity of the SH light generated by the probe beam reflected from the sample and the gate pulse was recorded as a function of time separation of those pulses under various .

Image of FIG. 2.
FIG. 2.

Pump-probe (time-resolved reflectivity change) signals obtained by changing the pump power in the sample at 4 K under the exciton resonance condition. The probe was 1.0 meV.

Image of FIG. 3.
FIG. 3.

Cross-correlation signals measured under the pump-probe conditions of Fig. 2 . was kept at 0 ps. The dotted and solid curves indicate the SH intensities measured in the pump-off and pump-on conditions, respectively.

Image of FIG. 4.
FIG. 4.

Cross-correlation signals measured under a pump power of 0.3 mW at various values. The dotted and solid curves indicate the SH intensities measured in the pump-off and pump-on conditions, respectively.

Image of FIG. 5.
FIG. 5.

Ratios between the SH signals measured with and without the pump. The signals obtained by (a) changing the pump power at and (b) changing at a pump power of 0.3 mW (b) were evaluated.

Image of FIG. 6.
FIG. 6.

Pump-probe signals obtained by changing the pump power in the sample at 4 K probed at 1.5166 eV. The probe was 1.0 meV.

Image of FIG. 7.
FIG. 7.

Cross-correlation signals measured under the pump power of 0.3mW at various values for a probe energy of 1.5166 eV, which causes ultrafast relaxation. The dotted and solid curves indicate the SH intensity measured in the pump-off and pump-on conditions, respectively.

Image of FIG. 8.
FIG. 8.

Ratios between SH signals with and without the pump. The signals obtained by changing at a pump power of 0.3 mW were evaluated.

Image of FIG. 9.
FIG. 9.

Ratios between SH signals with and without the pump. The signals obtained by changing the pump power at were evaluated.

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/content/aip/journal/jap/113/1/10.1063/1.4772717
2013-01-04
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of pumping on propagation velocities of confined exciton polaritons in GaAs/AlxGa1−xAs double heterostructure thin films under resonant and non-resonant probe conditions
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/1/10.1063/1.4772717
10.1063/1.4772717
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