Broadband slow-light in graded-grating-loaded plasmonic waveguides at telecom frequencies
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- Chen, L., Wang, G.P., Li, X. et al. Appl. Phys. B (2011) 104: 653. doi:10.1007/s00340-011-4476-5
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We explore developing graded-grating-loaded plasmonic waveguide for “trapped rainbow” at telecom frequencies by modulating feature sizes of gratings to extend its operational frequencies to the infrared domain. We show that such a structure is capable of localizing light waves of different infrared frequencies at different spatial positions. Such a slow-light device offers the advantages including a wide spectral band, a long photon lifetime and strong confinement, which may enable practical applications in various nanophotonic circuits.