Far-Infrared Absorption of PbSe Nanorods

Byung-Ryool Hyun, A. C. Bartnik, Weon-kyu Koh, N. I. Agladze, J. P. Wrubel, A. J. Sievers, Christopher B. Murray, Frank W. Wise

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Measurements of the far-infrared absorption spectra of PbSe nanocrystals and nanorods are presented. As the aspect ratio of the nanorods increases, the Fröhlich sphere resonance splits into two peaks. We analyze this splitting with a classical electrostatic model, which is based on the dielectric function of bulk PbSe but without any free-carrier contribution. Good agreement between the measured and calculated spectra indicates that resonances in the local field factors underlie the measured spectra. © 2011 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)2786-2790
Number of pages5
JournalNano Letters
Volume11
Issue number7
DOIs
StatePublished - Jul 13 2011
Externally publishedYes

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