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Tunable properties of localized surface plasmon resonance wavelength of gold nanoshell

Zhang Xing-Fang Yan Xin

Tunable properties of localized surface plasmon resonance wavelength of gold nanoshell

Zhang Xing-Fang, Yan Xin
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  • Received Date:  25 June 2012
  • Accepted Date:  13 September 2012
  • Published Online:  05 February 2013

Tunable properties of localized surface plasmon resonance wavelength of gold nanoshell

  • 1. College of Optoelectronics Engineering, Zaozhuang University, Zaozhuang 277160, China
Fund Project:  Project supported by the Research Fund for the Doctoral Program of Zaozhuang University, China.

Abstract: The effects of shell thickness, inner core size, and dielectric constants of core and embedding medium on the localized surface plasmon resonance wavelength of gold nanoshell are investigated by Mie theory. The results show that the extinction peak of gold nanoshell is first blue-shifted and then red-shifted with the increase of shell thickness, that the shift shell thickness corresponding to quadrupolar wavelength is greater than that corresponding to dipolar wavelength, and that the ratio of the shift shell thickness to the inner core size decreases with the increase of inner core size, and increases with the increase of dielectric constant of inner core or embedding medium. The resonance peaks in the scattering spectra have similar phenomena to those in extinction spectra as the shell thickness increases. The shift of the spectral peak is ascribed to the plasmon hybridization and phase retardation effect.

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