Transmission, reflection, and absorption spectroscopy of graphene microribbons in the terahertz region

Both transmission and reflection spectra were obtained from graphene microribbons on a SiC substrate, which resonantly coupled with terahertz light through plasmon excitation. An absorption spectrum was also derived from the transmission and reflection spectra. Absorption by the confined intraband p...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 55; no. 6S1; pp. 6 - 06GF08
Main Authors Suzuki, Satoru, Takamura, Makoto, Yamamoto, Hideki
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.06.2016
Subjects
Absorption
Absorption spectroscopy
Graphene
Plasmons
Reflection
Spectra
Substrates
Surface chemistry
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Summary:Both transmission and reflection spectra were obtained from graphene microribbons on a SiC substrate, which resonantly coupled with terahertz light through plasmon excitation. An absorption spectrum was also derived from the transmission and reflection spectra. Absorption by the confined intraband plasmons reached 5-10%/layer, which is considerably larger than the wavelength-independent interband absorption of 2.3%/layer. The absorption was found to be larger when the microribbons/substrate sample was illuminated from the back surface than from the ribbon surface because of an interference effect at the surface.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.55.06GF08