期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 28, 期 14, 页码 2030-2036出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2010.2051320
关键词
Grating; plasmons; slow light; waveguide
资金
- National Natural Science Foundation of China [60636030, 60876049, 60906028]
The formations of the surface plasmon polariton (SPP) bands in metal/air/metal (MAM) sub-wavelength plasmonic grating waveguide (PGW) are proposed. The band gaps originating from the highly localized resonances inside the grooves can be simply estimated from the round trip phase condition. Due to the overlap of the localized SPPs between the neighboring grooves, a Bloch mode forms in the bandgap and can be engineered to build a very flat dispersion for slow light. A chirped PGW with groove depth varying is also demonstrated to trap light, which is validated by finite-difference time-domain (FDTD) simulations with both continuous and pulse excitations.
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