The Transmission Characteristics of Asymmetrical Multi-Teeth-Shaped Plasmonic Waveguide Structure

The transmission characteristics of asymmetrical multi-teeth-shaped plasmonic waveguide structure are investigated theoretically and numerically. The tunable dual flat bandgaps are achieved in our proposed structure. This feature can provide a promising application for plasmonic bandstop filter. In addition, according to the hybrid effects of the first order resonance and high order resonance of N identical asymmetrical teeth, a sharp transmission peak can be obtained. This peak, which is within two bandgaps, possesses a relative small full-width at half-maximum, about 11.5 nm. Moreover, the resonant wavelength of this sharp peak can be regulated by adjusting the relative depths of N asymmetrical teeth. These results that we acquire may have important application potential on high-density nanoplasmonic integration circuits.National Natural Science Foundation of China [60907003, 61465004]; Foundation of NUDT [JC13-02-13]; Hunan Provincial Natural Science Foundation of China [13JJ3001]; Program for New Century Excellent Talents in University [NCET-12-0142]; Guangxi Natural Science Foundation of China [2013GXNSFAA019338]; Science and Technology Research Key Project of Guangxi Department of Education, China [2013ZD026]; Innovation Project of GUET Graduate Education [YJCXS201522]SCI(E)ARTICLEyangjunbo008@sohu.com; xgl.hy@126.com212467-24702