中国物理B ›› 2010, Vol. 19 ›› Issue (11): 117310-117310.doi: 10.1088/1674-1056/19/11/117310

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Tunable surface-plasmon-resonance wavelength of silver island films

王继飞1, 周子游1, 刘菊1, 杨海艳1, 李宏建2, 李雪勇3   

  1. (1)College of Physics Science and Technology, Central South University, Changsha 410083, China; (2)College of Physics Science and Technology, Central South University, Changsha 410083, China; School of Materials Science and Engineering, Central South University, Changsha 410083, China; (3)School of Materials Science and Engineering, Central South University, Changsha 410083, China
  • 收稿日期:2010-05-16 修回日期:2010-06-23 出版日期:2010-11-15 发布日期:2010-11-15
  • 基金资助:
    Project supported by the Distinguished Youth Foundation of Hunan Province, China (Grant No. 03JJY1008), the Science Foundation for Post-doctorate of China, (Grant No. 2004035083), and the Natural Science Foundation of Hunan Province, China (Grant No. 06JJ2034).

Tunable surface-plasmon-resonance wavelength of silver island films

Wang Ji-Fei(王继飞)a), Li Hong-Jian(李宏建) a)b)†, Zhou Zi-You(周子游)a), Li Xue-Yong(李雪勇)b), Liu Ju(刘菊)a), and Yang Hai-Yan(杨海艳)a)   

  1. a College of Physics Science and Technology, Central South University, Changsha 410083, China; b School of Materials Science and Engineering, Central South University, Changsha 410083, China
  • Received:2010-05-16 Revised:2010-06-23 Online:2010-11-15 Published:2010-11-15
  • Supported by:
    Project supported by the Distinguished Youth Foundation of Hunan Province, China (Grant No. 03JJY1008), the Science Foundation for Post-doctorate of China, (Grant No. 2004035083), and the Natural Science Foundation of Hunan Province, China (Grant No. 06JJ2034).

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摘要： This paper experimentally and theoretically investigates the effect of the underlayer medium on tuning of the surface plasmon resonance (SPR) wavelength of silver island films, and the effect of substrate temperature on the morphologies and optical properties of the films. From the absorption spectra of single Ag with various thickness and overcoated (Ag/TiO2) films deposited on glass substrates at various substrate temperatures by RF magnetron sputtering, we demonstrate that the surface plasmon resonance wavelength can be made tunable by changing the underlayer medium, the thickness of metal layer and the substrate temperature. By varying substrate temperatures, the interparticle coupling effects on plasmon resonances of nanosilver particles enhance as the spacing between the particles reduces. When the substrate temperature is up to 500 ℃, the absorption peak decreases sharply and shifts to shorter wavelength side due to the severe coalescence between silver islands in the film.

Abstract: This paper experimentally and theoretically investigates the effect of the underlayer medium on tuning of the surface plasmon resonance (SPR) wavelength of silver island films, and the effect of substrate temperature on the morphologies and optical properties of the films. From the absorption spectra of single Ag with various thickness and overcoated (Ag/TiO2) films deposited on glass substrates at various substrate temperatures by RF magnetron sputtering, we demonstrate that the surface plasmon resonance wavelength can be made tunable by changing the underlayer medium, the thickness of metal layer and the substrate temperature. By varying substrate temperatures, the interparticle coupling effects on plasmon resonances of nanosilver particles enhance as the spacing between the particles reduces. When the substrate temperature is up to 500 ℃, the absorption peak decreases sharply and shifts to shorter wavelength side due to the severe coalescence between silver islands in the film.

Key words: Ag/TiO2 island thin film, surface plasmons, absorption spectrum, substrate temperature

中图分类号:  (Thin film structure and morphology)

  • 68.55.-a
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.66.Bz (Metals and metallic alloys) 81.15.Cd (Deposition by sputtering)