Ultrawide-bandwidth slow-light system based on thz plasmonic graded metallic grating structures

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

Research output: Contribution to journalArticlepeer-review

391 Scopus citations


We explore a novel mechanism for slowing down THz waves based on metallic grating structures with graded depths, whose dispersion curves and cutoff frequencies are different at different locations. Since the group velocity of spoof surface plasmons at the cutoff frequency is extremely low, THz waves are actually stopped at different positions for different frequencies. The separation between stopped waves can be tuned by changing the grade of the grating depths. This structure offers the advantage of reducing the speed of the light over an ultrawide spectral band, and the ability to operate at various temperatures, but demands a stringent requirement for the temperature stability. © 2008 The American Physical Society.
Original languageEnglish (US)
JournalPhysical Review Letters
Issue number25
StatePublished - Jun 27 2008
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

  • General Physics and Astronomy


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