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.
Nearly intrinsic exciton lifetimes in single twin-free core-shell nanowire heterostructures
Rent this article for
View: Figures


Image of FIG. 1.
FIG. 1.

(a) A FESEM micrograph of the core-shell NWs studied. (b) A TEM micrograph of a GaAs NW core without AlGaAs shell layer. This shows the minimal tapering and straight sidewalls of the GaAs cores. (c) A magnified TEM micrograph of the same GaAs NW which shows the absence of twin defects.

Image of FIG. 2.
FIG. 2.

cw PL spectra as a function of power from single NW (wire 2). .

Image of FIG. 3.
FIG. 3.

Low-power time decays accumulated at the peak emission energy from three single core-shell NWs grown using the two-temperature technique.

Image of FIG. 4.
FIG. 4.

Time-resolved spectra from a NW (wire 4) which exhibits a recombination lifetime of . (a) An emission energy vs time 2D map. Lighter colors represent higher intensities than darker colors. (b) Spectra extracted from the time-resolved spectrum at 50, 300, 600, and after the laser pulse and plotted on an enlarged energy scale. Arrows (blue) show the calculated band gap renormalization and the sum of the electron and hole Fermi energies for an electron-hole pair density of at zero temperature.


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nearly intrinsic exciton lifetimes in single twin-free GaAs∕AlGaAs core-shell nanowire heterostructures