PbS quantum dot electroabsorption modulation across the extended communications band 1200-1700 nm

Ethan J.D. Klem; Larissa Levina; Edward H. Sargent

doi:10.1063/1.2001737

PbS quantum dot electroabsorption modulation across the extended communications band 1200-1700 nm

Ethan J.D. Klem^*, Larissa Levina, Edward H. Sargent

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

We report electric field-induced modulation of absorption in PbS nanocrystal quantum dots across the spectral region 600-2000 nm, encompassing the entire telecommunications band. The maxima in the electroabsorption spectra correspond with the positions of the first excitonic peak, confirming the predominance of excitonic broadening as the basis for the observed effect. We estimate the change in dipole moment to be on the order of 20 D in 7 nm diameter PbS nanocrystals compared to previously-reported ∼100 D in CdSe.

Original language	English (US)
Article number	053101
Journal	Applied Physics Letters
Volume	87
Issue number	5
DOIs	https://doi.org/10.1063/1.2001737
State	Published - 2005

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2001737

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title = "PbS quantum dot electroabsorption modulation across the extended communications band 1200-1700 nm",

abstract = "We report electric field-induced modulation of absorption in PbS nanocrystal quantum dots across the spectral region 600-2000 nm, encompassing the entire telecommunications band. The maxima in the electroabsorption spectra correspond with the positions of the first excitonic peak, confirming the predominance of excitonic broadening as the basis for the observed effect. We estimate the change in dipole moment to be on the order of 20 D in 7 nm diameter PbS nanocrystals compared to previously-reported ∼100 D in CdSe.",

author = "Klem, {Ethan J.D.} and Larissa Levina and Sargent, {Edward H.}",

year = "2005",

doi = "10.1063/1.2001737",

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journal = "Applied Physics Letters",

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AU - Klem, Ethan J.D.

AU - Levina, Larissa

AU - Sargent, Edward H.

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N2 - We report electric field-induced modulation of absorption in PbS nanocrystal quantum dots across the spectral region 600-2000 nm, encompassing the entire telecommunications band. The maxima in the electroabsorption spectra correspond with the positions of the first excitonic peak, confirming the predominance of excitonic broadening as the basis for the observed effect. We estimate the change in dipole moment to be on the order of 20 D in 7 nm diameter PbS nanocrystals compared to previously-reported ∼100 D in CdSe.

AB - We report electric field-induced modulation of absorption in PbS nanocrystal quantum dots across the spectral region 600-2000 nm, encompassing the entire telecommunications band. The maxima in the electroabsorption spectra correspond with the positions of the first excitonic peak, confirming the predominance of excitonic broadening as the basis for the observed effect. We estimate the change in dipole moment to be on the order of 20 D in 7 nm diameter PbS nanocrystals compared to previously-reported ∼100 D in CdSe.

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PbS quantum dot electroabsorption modulation across the extended communications band 1200-1700 nm

Abstract

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