title: Optical transmission through compound gold surface relief slit arrays.
abstract: The optical transmissions through compound gold surface relief slit arrays were investigated theoretically by using the finite difference time domain method. The differences of transmission, reflection, and absorption spectra of the bare slit and the surface relief grating are discussed. The transmission spectra influenced by different dielectric constants of medium in the two slits and different slits widths. When the two slits fill different dielectrics, the presence of the medium induces a red-shift of the plasmon resonances. Along with the dielectric constant in one slit increasing, there appear obvious dips in the transmission spectra. Based on the magnetic and electric field distributions, Fabry-Pérot-like resonance and phase resonance mechanisms have been suggested for the physical origins of these observations.
authors: Xin
authors: X
authors: Zhou
authors: Jianshu
authors: J
authors: Fang
authors: Diwu
authors: D
authors: Yang
authors: Xuehui
authors: X
authors: Zhao
authors: Bin
authors: B
authors: Tang
authors: Zhimin
authors: Z
authors: Liu