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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 23215–23226

Infrared surface plasmon resonance of AZO-Ag-AZO sandwich thin films

Joshua T. Guske, Jeff Brown, Alex Welsh, and Stefan Franzen  »View Author Affiliations

Optics Express, Vol. 20, Issue 21, pp. 23215-23226 (2012)

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Near-infrared surface plasmon resonance (SPR) spectra were collected of thin multilayer films of aluminum-doped zinc oxide (AZO) / silver (Ag) / AZO on BK-7 glass in the Kretschmann configuration in air, with the silver layer thickness varying from 5 nm to 50 nm. The SPR results were interpreted by modeling the reflectance with a five-layer transfer-matrix method, with the aid of a simplex algorithm. The model indicated that the Ag plasma frequency was significantly higher than the bulk value, possibly due to Schottky effect charge transfer from the AZO to the Ag layer. Continuous silver films were made as thin as 10 nm, indicating an inhibition of metal island formation for Ag deposited on AZO.

© 2012 OSA

OCIS Codes
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(310.0310) Thin films : Thin films
(310.6860) Thin films : Thin films, optical properties
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: August 7, 2012
Revised Manuscript: September 16, 2012
Manuscript Accepted: September 17, 2012
Published: September 25, 2012

Joshua T. Guske, Jeff Brown, Alex Welsh, and Stefan Franzen, "Infrared surface plasmon resonance of AZO-Ag-AZO sandwich thin films," Opt. Express 20, 23215-23226 (2012)

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