TITLE

Influence of plasmons on terahertz conductivity measurements

AUTHOR(S)
Han-Kwang Nienhuys; Sundström, Villy
PUB. DATE
July 2005
SOURCE
Applied Physics Letters;7/4/2005, Vol. 87 Issue 1, p012101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Time-domain terahertz spectroscopy allows measuring the complex conductivity spectrum of materials at frequencies on the order of 1 THz. Typically, terahertz (THz) studies produce conductivity spectra that are different from those predicted by the classical Drude model, especially in nanostructured materials. We claim that plasmon resonances in particles that are small compared to the THz wavelength cause these deviations. This is supported by measurements on photoexcited silicon, in bulk as well as in micron-sized particles. In the latter, the behavior is vastly different and strongly dependent on charge carrier concentration.
ACCESSION #
18008442

 

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