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

Volume

22

Issue

20

fYear

2010

Firstpage

1482

Lastpage

1484

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2057414

Filename

5510089