The transmission of a subwavelength zigzag-shaped metal-insulator-metal (MIM) plasmonic waveguide structure was numerically researched by using the finite-difference time-domain (FDTD) method. The zigzag-shaped waveguide has two bending corners, where waveguide can extend out from one to four cuts. Each cut can be looked as a self-existent resonant cavity. The resonant wavelength is approximately linear proportional to the depth of cut, and independent on the direction of cut. When any cut satisfies with the resonant condition, the transmission of the waveguide structure is close to zero at th...
