Title :
Flat Surface Plasmon Polariton Bands in Bragg Grating Waveguide for Slow Light
Author :
Zhang, Jing ; Cai, Likang ; Bai, Wenli ; Song, Guofeng
Author_Institution :
Inst. of Semicond., Chinese Acad. of Sci., Beijing, China
fDate :
7/15/2010 12:00:00 AM
Abstract :
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.
Keywords :
Bragg gratings; chirp modulation; finite difference time-domain analysis; optical waveguides; plasmonics; polaritons; slow light; surface plasmons; Bragg grating waveguide; chirped plasmonic grating waveguide; continuous excitation; finite difference time domain simulation; flat surface plasmon polariton band; metal-air-metal subwavelength plasmonic grating waveguide; pulse excitations; slow light; Bragg gratings; Chirp; Finite difference methods; Phase estimation; Photonic band gap; Plasmons; Resonance; Slow light; Surface waves; Time domain analysis; Grating; plasmons; slow light; waveguide;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2051320
