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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20462–20467

Strong infrared absorber: surface-microstructured Au film replicated from black silicon

Saifeng Zhang, Yuan Li, Guojin Feng, Baocheng Zhu, Shiyi Xiao, Lei Zhou, and Li Zhao  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 20462-20467 (2011)

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With quasi-periodic microstructures, great enhancement of infrared light absorption of Au film over a broad wavelength band (2.7~15.1 μm) was realized experimentally for the first time. The microstructured Au film was prepared by replica molding of the surface of femtosecond (fs) laser microstructured silicon (black silicon). This unique absorption characteristic is mainly ascribed to good impedance match from free space to Au film. The surface of the sample was examined by X-ray photoelectron spectroscopy (XPS) and the four peaks of absorptance were ascribed to residual polydimethylsiloxane (PDMS), H2SO4, adsorbed water and CO2 in the air, respectively.

© 2011 OSA

OCIS Codes
(160.3900) Materials : Metals
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:

Original Manuscript: July 19, 2011
Revised Manuscript: September 2, 2011
Manuscript Accepted: September 8, 2011
Published: October 3, 2011

Saifeng Zhang, Yuan Li, Guojin Feng, Baocheng Zhu, Shiyi Xiao, Lei Zhou, and Li Zhao, "Strong infrared absorber: surface-microstructured Au film replicated from black silicon," Opt. Express 19, 20462-20467 (2011)

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