TITLE

Determining the terahertz optical properties of subwavelength films using semiconductor surface plasmons

AUTHOR(S)
Isaac, T. H.; Barnes, W. L.; Hendry, E.
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p241115
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
By employing a combination of time-domain measurements and numerical calculations, we demonstrate that the semiconductor InSb supports a strongly confined surface plasmon (SP) in the terahertz frequency range. We show that these SPs can be used to enhance the light-matter interaction with dielectric layers above the semiconductor surface, thereby allowing us to detect the presence of polystyrene layers around 1000 times thinner than the free space wavelength of the terahertz light. Finally we discuss the viability of using semiconductor SPs for the purposes of terahertz sensing and spectroscopy.
ACCESSION #
35922097

 

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