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

Research output: Contribution to journalArticlepeer-review

55 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 languageEnglish (US)
Article number053101
JournalApplied Physics Letters
Volume87
Issue number5
DOIs
StatePublished - 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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