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.
Observation of optical gain in solutions of CdS quantum dots at room temperature in the blue region
Rent:
Rent this article for
USD
10.1063/1.2217138
/content/aip/journal/apl/88/26/10.1063/1.2217138
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/26/10.1063/1.2217138
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Absorption and photoluminescence (PL) spectra of sample 1 (blue lines) and sample 2 (red lines). Inset: TEM image of sample 1 shows an average diameter of about , which is much smaller than the bulk exciton Bohr radius of CdS . In addition to intense sharp band gap emission peaks, there are deep trap emission bands ranging from caused by nonradiative electron and hole losses to the defects and impurities on the surface and/or within the QDs. (b) Photoluminescence decay of sample 1 (blue line) and sample 2 (red line). The signal is fitted by biexponential decay with time constants (amplitudes) of (0.55) and (0.45) for sample 1 and (0.42) and (0.58) for sample 2.

Image of FIG. 2.
FIG. 2.

(Color online) (a) and (b) present normalized transient absorption changes of samples 1 and 2 as function of time delay. Under moderate pump fluence , the optical gain lifetime is determined to be as long as . (c) shows pump intensity dependence of at time delay of . The pump fluence thresholds of optical gain are 2.24 and for sample 1 and 2, respectively.

Loading

Article metrics loading...

/content/aip/journal/apl/88/26/10.1063/1.2217138
2006-06-29
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of optical gain in solutions of CdS quantum dots at room temperature in the blue region
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/26/10.1063/1.2217138
10.1063/1.2217138
SEARCH_EXPAND_ITEM