Rainbow trapping and releasing by chirped plasmonic waveguides at visible frequencies

Lin Chen, Guo Ping Wang, Qiaoqiang Gan, Filbert J. Bartoli

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


We report on "trapping rainbow" on silver films covered by a one-dimensional chirped dielectric grating. We attribute the trapping effect to correlative dispersive relation between the excited surface plasmon polaritons (SPPs) and the lattice constant of the dielectric grating on the metal film, which results in localization of SPPs of different frequencies at different spatial positions. We further reveal that, by attaching another uniform dielectric grating on the other side of the metal film and real time tuning the refractive index of the grating, the trapped rainbow can be released in sequence. Analytical results are demonstrated by finite-difference time-domain simulation. © 2010 American Institute of Physics.
Original languageEnglish (US)
JournalApplied Physics Letters
Issue number15
StatePublished - Oct 11 2010
Externally publishedYes

Bibliographical note

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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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