1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
In-plane interdot carrier transfer in InAs/GaAs quantum dots
Rent:
Rent this article for
USD
10.1063/1.3701578
/content/aip/journal/apl/100/15/10.1063/1.3701578
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3701578

Figures

Image of FIG. 1.
FIG. 1.

(a) Typical PL spectra of S850 for quasi-resonant excitation where the horizontal axis gives the difference of the excitation energy and the measured PL energy. The black, red, green, and blue lines correspond to 1.363 eV, 1.367 eV, 1.387 eV, and 1.398 eV excitation energies, respectively. (b) The QD band diagram showing the FEL (THz) excitation in red, the PL recombination in blue and the relaxation paths in black arrows. As shown, the QD "A" loses carriers while QD "B" gains carries due to carrier redistribution after THz excitation. The NIR excitation is not shown.

Image of FIG. 2.
FIG. 2.

Streak camera image of the PL transient at 8 K from the QD sample S900 for quasi-resonant excitation by the Ti:sapphire laser (a) without FEL pulse and (b) with FEL pulse (quenching by the FEL pulse is indicated by the arrow) of fluence 1 . PL transient integrated over few meV around (c) 1.42 eV (red lines) and (d) 1.40 eV (blue lines) showing the quenching of the PL. The reference transients are shown by dashed lines.

Image of FIG. 3.
FIG. 3.

Plot of the measured time resolved PL emission (gray filled region) from QD sample S900 at the (a) high and (b) low energy PL peaks for quasi resonant Ti:sapphire excitation. Quenching of the PL by the FEL pulse occur around 300 ps. The transients are fitted using rate equation model with (solid line) and without (dashed line) interdot carrier transfer channels.

Image of FIG. 4.
FIG. 4.

The amount of (a) PL dip depth q and (b) interdot carrier transfer as obtained from the rate equation model fit. The circles and the squares represent samples S900 and S850, respectively. The open (solid) symbols correspond to the higher (lower) energy PL peak.

Tables

Generic image for table
Table I.

Sample details at 10 K (Ref. 10).

Loading

Article metrics loading...

/content/aip/journal/apl/100/15/10.1063/1.3701578
2012-04-09
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: In-plane interdot carrier transfer in InAs/GaAs quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3701578
10.1063/1.3701578
SEARCH_EXPAND_ITEM