Title :
Extraordinary Transmission Through Ag–Si Structure Perforated With Rhombus Lattice Hole Arrays
Author :
Wu, Yi-Ting ; Chang, Yi-Tsung ; Jiang, Yu-Wei ; Chang, Pei-En ; Ye, Yi-Han ; Tzuang, Dah-Ching ; Chen, Hung-Hsin ; Huang, Hao-Fu ; Lee, Si-Chen
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This investigation elucidates the transmission characteristics of an Ag-Si structure on which an Ag film is perforated with a rhombus-shape of lattice holes. The transmission in the Ag-Si mode depends approximately linearly on the numbers of degenerate modes at long wavelengths at which the couplings between Ag-Si and Ag-air modes are weak. At the shorter wavelengths where Ag-Si and Ag-air modes are coupled together, the transmission intensities are approximately constant without an apparent peak at wavelengths longer than those of the Ag-air modes. The intensities decay rapidly at lower wavelengths owing the asymmetric slope of the Ag-air mode in the spectra.
Keywords :
light transmission; metal-insulator boundaries; metallic thin films; optical arrays; optical multilayers; silicon; silver; Ag-Si; Ag-air modes; asymmetric slope; degenerate modes; extraordinary transmission; perforated structure; rhombus lattice hole arrays; Couplings; Dielectric constant; Dielectric materials; Dispersion; Fabrication; Lattices; Linear approximation; Plasmons; Semiconductor films; Shape; Rhombus lattice; surface plasmon;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2057414
