Effect of Silver Thickness on the Formation of Surface Plasmon Polaritons in Silver-Coated Silicon Nitride Photonic Crystal Slabs

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概要

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• A systematic study of the influence of silver film thickness on the transmittance spectra through a silicon nitride photonic crystal slab (SiN-PCS) coated with silver films of various thicknesses is presented. The transmission spectrum through a bare SiN-PCS reveals guided resonances. When an ultrathin silver film (${<}10$ nm in thickness) is coated on a SiN-PCS, isolated silver nanoparticles are formed resulting in the suppression of guided resonances. In addition, a red shift is found in the optical transmittance spectra measured on SiN-PCS coated with a progressively thicker silver film. This may be attributed to the formation of localized surface plasmon resonances at the interface between silver nanoparticles and silicon nitride. A continuous texture is formed as the thickness of the silver film is increased up to 20 nm, resulting in a transition from localized surface plasmon resonances to surface plasmon polaritons. Furthermore, the surface plasmon polaritons that are formed externally (internally) are identified in SiN-PCS coated on one side (double sides) with a 20-nm-thick silver film.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2010-06-25

著者

• Shyu Jia-Hong

  Department of Physics, National Changhua University of Education, Changhua 500, Taiwan

• Jia-Hong Shyu

  Department of Physics, National Changhua University of Education, Changhua 500, Taiwan

• Huang-Ming Lee

  Department of Physics, National Changhua University of Education, Changhua 500, Taiwan

• Chao-Yi Tai

  Department of Optics and Photonics, National Central University, Taoyuan 320, Taiwan

• Neil Ou

  Institute of Photonics, National Changhua University of Education, Changhua 500, Taiwan

• Jui-Hsing Chien

  Institute of Photonics, National Changhua University of Education, Changhua 500, Taiwan

• Ou Neil

  Institute of Photonics, National Changhua University of Education, Changhua 500, Taiwan

• Chien Jui-Hsing

  Institute of Photonics, National Changhua University of Education, Changhua 500, Taiwan

• Jong-Ching Wu

  Department of Physics, National Changhua University of Education, Changhua 500, Taiwan

関連論文

• Tunable Surface Plasmon Resonances Based on Chromium Disk Array Containing Liquid Crystals
• Effect of Silver Thickness on the Formation of Surface Plasmon Polaritons in Silver-Coated Silicon Nitride Photonic Crystal Slabs

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