Properties of defected one-dimensional terahertz plasmonic crystal films in a metal air-gap waveguide

We investigated properties of localized modes of one-dimensional terahertz plasmonic crystal films with defects in a metal air-gap waveguide by terahertz time-domain spectroscopy experiments and finite-difference time-domain simulations. A defect was created by varying the width of an air slit at th...

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Bibliographic Details
Published inJournal of applied physics Vol. 110; no. 9; pp. 093101 - 093101-4
Main Authors Lee, Sun-Goo, Su Lee, Eui, Jeon, Tae-In, Kee, Chul-Sik
Format Journal Article
LanguageEnglish
Published American Institute of Physics 01.11.2011
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Summary:We investigated properties of localized modes of one-dimensional terahertz plasmonic crystal films with defects in a metal air-gap waveguide by terahertz time-domain spectroscopy experiments and finite-difference time-domain simulations. A defect was created by varying the width of an air slit at the center of the plasmonic crystal film. The donor (accept)-like defect modes were observed when the width of the defect air slit increases (decreases) from an initial width. The quality factor increases abruptly as the air-gap size decreases, while the defect mode frequency slightly decreases. The high quality-defect mode was examined for terahertz sensor applications.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3658255