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http://ir.ncue.edu.tw/ir/handle/987654321/18586
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| Title: | Effect of Silver Thickness on the Formation of Surface Plasmon Polaritons in Silver-Coated Silicon Nitride Photonic Crystal Slabs |
| Authors: | Shyu, Jia-Hong;Ou, Neil;Chien, Jui-Hsing;Lee, Huang-Ming;Tai, Chao-Yi;Wu, Jong-Ching |
| Contributors: | 物理學系 |
| Date: | 2010
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| Issue Date: | 2014-06-06T07:19:17Z
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| Publisher: | The Japan Society of Applied Physics |
| Abstract: | 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. |
| Relation: | Japanese Journal of Applied Physics, 49(6S): 06GG07 |
| Appears in Collections: | [物理學系] 期刊論文
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