[2] [2] Wu Fengqin, Han Dezhuan, Hu Xinhua, et al . Complete surface plasmon-polariton band gap and gap-governed waveguiding, bending and splitting[J]. J. Phys.: Condens. Matter , 2009, 21(18): 185010.

[6] [6] Lu Qijing, Zou Changling, Chen Daru, et al . Extreme light confinement and low loss in triangle hybrid plasmonic waveguide[J]. Optics Communications , 2014, 319: 141-146.

[8] [8] Oulton R F, Sorger V J, Genov D A, et al . A hybrid plasmonic waveguide for subwavelength confinement and long-range propagation[J]. Nature Photonics , 2008, 2(8): 496-500.

[9] [9] Bian Yusheng, Zheng Zheng, Zhao Xin, et al . Gain enhancement in a V-shaped plasmonic slot waveguide for efficient loss compensation at the subwavelength scale[J]. Optics Communications , 2013, 294: 414-419.

[10] [10] Wei Wei, Zhang Xia, Yu Hui, et al . Plasmonic waveguiding properties of the gap plasmon mode with a dielectric substrate[J]. Photonics and Nanostructures-Fundamentals and Applications , 2013, 11(3): 279-287.

[11] [11] Yang Xiaodong, lshikawa A, Yin Xiaobo, et al . Hybrid photonic plasmonic crystal nano cavities[J]. ACS Nano , 2011, 5(4): 2831-2838.

[12] [12] Hosseini A, Massoud Y. A low-loss metal-insulator-metal plasmonic Bragg reflector[J]. Opt. Expr. , 2006, 14(23): 11318-11323.

[18] [18] Buckley R, Berini P. Figures of merit for 2D surface plasmon waveguides and application tometal stripes[J]. Opt. Expr. , 2007, 15(19): 12174-12182.

[19] [19] Chen L, et al . Novel hybrid plasmonic waveguide consisting of twoidentical dielectric nanowires symmetrically placed on each side of a thin metal film[J]. Opt. Expr. , 2012, 20(18): 20535-20544.