Fabry-Perot effects in THz time-domain spectroscopy of plasmonic band-gap structures

J. W. Lee, M. A. Seo, D. S. Kim, S. C. Jeoung, Ch Lienau, J. H. Kang, Q. Han Park

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Using terahertz time-domain spectroscopy, we study transmission in one-dimensional arrays of slits fabricated on metal plates by laser machining. The enhanced peaks of zero-order transmission spectra are attributed to the combined effects of Fabry-Perot and surface plasmon resonances. Angle dependence of transmission spectra shows that the strongly surface plasmon-enhanced peaks appear when the Fabry-Perot-type resonance is located nearby in energy. This means that surface waves traveling in the horizontal direction couple with nearest Fabry-Perot resonance to generate enhanced peaks. These results are in excellent agreement with theoretical calculations.

Original languageEnglish
Article number071114
JournalApplied Physics Letters
Volume88
Issue number7
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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