Bidirectional subwavelength slit splitter for THz surface plasmons

Qiaoqiang Gan, Zhan Fu, Yujie J. Ding, Filbert J. Bartoli

Research output: Contribution to journalArticlepeer-review

64 Scopus citations


We have conducted a feasibility study of a frequency splitter operating at THz frequencies, based on a bidirectional subwavelength slit simulated using two-dimensional finite difference time domain (FDTD) techniques. The near-field wave emanating from the narrow slit serves as a subwavelength-scaled excitation source. By placing two optimized grating structures on the opposite sides of the slit, the THz waves at different frequencies are guided in the two desired directions. Confinement of the optical field is illustrated for different surface structures. © 2007 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)18050-18055
Number of pages6
JournalOptics Express
Issue number26
StatePublished - Dec 24 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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