Low-threshold stimulated emission using colloidal quantum wells

Chunxing She, Igor Fedin, Dmitriy S. Dolzhnikov, Arnaud Demortière, Richard D Schaller, Matthew Pelton, Dmitri V. Talapin

Research output: Contribution to journalArticle

193 Citations (Scopus)

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 languageEnglish
Pages (from-to)2772-2777
Number of pages6
JournalNano Letters
Volume14
Issue number5
DOIs
Publication statusPublished - May 14 2014

Fingerprint

Stimulated emission
stimulated emission
Nanocrystals
Semiconductor quantum wells
quantum wells
thresholds
Spontaneous emission
nanocrystals
Linewidth
Amplification
Pumps
Semiconductor materials
spontaneous emission
lasing
radiant flux density
fluence
pumps
saturation
cross sections

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

She, C., Fedin, I., Dolzhnikov, D. S., Demortière, A., Schaller, R. D., Pelton, M., & Talapin, D. V. (2014). Low-threshold stimulated emission using colloidal quantum wells. Nano Letters, 14(5), 2772-2777. https://doi.org/10.1021/nl500775p

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 journalArticle

She, C, Fedin, I, Dolzhnikov, DS, Demortière, A, Schaller, RD, Pelton, M & Talapin, DV 2014, 'Low-threshold stimulated emission using colloidal quantum wells', Nano Letters, vol. 14, no. 5, pp. 2772-2777. https://doi.org/10.1021/nl500775p
She C, Fedin I, Dolzhnikov DS, Demortière A, Schaller RD, Pelton M et al. Low-threshold stimulated emission using colloidal quantum wells. Nano Letters. 2014 May 14;14(5):2772-2777. https://doi.org/10.1021/nl500775p
She, Chunxing ; Fedin, Igor ; Dolzhnikov, Dmitriy S. ; Demortière, Arnaud ; Schaller, Richard D ; Pelton, Matthew ; Talapin, Dmitri V. / Low-threshold stimulated emission using colloidal quantum wells. In: Nano Letters. 2014 ; Vol. 14, No. 5. pp. 2772-2777.
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