Abstract
The use of colloidal semiconductor nanocrystals for optical amplification and lasing has been limited by the need for high input power densities. Here we show that colloidal nanoplatelets produce amplified spontaneous emission with thresholds as low as 6 μJ/cm2 and gain as high as 600 cm -1, both a significant improvement over colloidal nanocrystals; in addition, gain saturation occurs at pump fluences 2 orders of magnitude higher than the threshold. We attribute this exceptional performance to large optical cross-sections, slow Auger recombination rates, and narrow ensemble emission line widths.
| Original language | English |
|---|---|
| Pages (from-to) | 2772-2777 |
| Number of pages | 6 |
| Journal | Nano Letters |
| Volume | 14 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 14 2014 |
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Keywords
- colloidal quantum wells
- core/shell nanocrystals
- Nanoplatelets
- optical gain
- stimulated emission
ASJC Scopus subject areas
- Condensed Matter Physics
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Mechanical Engineering
Cite this
Low-threshold stimulated emission using colloidal quantum wells. / She, Chunxing; Fedin, Igor; Dolzhnikov, Dmitriy S.; Demortière, Arnaud; Schaller, Richard D; Pelton, Matthew; Talapin, Dmitri V.
In: Nano Letters, Vol. 14, No. 5, 14.05.2014, p. 2772-2777.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Low-threshold stimulated emission using colloidal quantum wells
AU - She, Chunxing
AU - Fedin, Igor
AU - Dolzhnikov, Dmitriy S.
AU - Demortière, Arnaud
AU - Schaller, Richard D
AU - Pelton, Matthew
AU - Talapin, Dmitri V.
PY - 2014/5/14
Y1 - 2014/5/14
N2 - The use of colloidal semiconductor nanocrystals for optical amplification and lasing has been limited by the need for high input power densities. Here we show that colloidal nanoplatelets produce amplified spontaneous emission with thresholds as low as 6 μJ/cm2 and gain as high as 600 cm -1, both a significant improvement over colloidal nanocrystals; in addition, gain saturation occurs at pump fluences 2 orders of magnitude higher than the threshold. We attribute this exceptional performance to large optical cross-sections, slow Auger recombination rates, and narrow ensemble emission line widths.
AB - The use of colloidal semiconductor nanocrystals for optical amplification and lasing has been limited by the need for high input power densities. Here we show that colloidal nanoplatelets produce amplified spontaneous emission with thresholds as low as 6 μJ/cm2 and gain as high as 600 cm -1, both a significant improvement over colloidal nanocrystals; in addition, gain saturation occurs at pump fluences 2 orders of magnitude higher than the threshold. We attribute this exceptional performance to large optical cross-sections, slow Auger recombination rates, and narrow ensemble emission line widths.
KW - colloidal quantum wells
KW - core/shell nanocrystals
KW - Nanoplatelets
KW - optical gain
KW - stimulated emission
UR - http://www.scopus.com/inward/record.url?scp=84900517855&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84900517855&partnerID=8YFLogxK
U2 - 10.1021/nl500775p
DO - 10.1021/nl500775p
M3 - Article
AN - SCOPUS:84900517855
VL - 14
SP - 2772
EP - 2777
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 5
ER -