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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 21918–21925

Saturable absorption in composites doped with metal nanoparticles

Kwang-Hyon Kim, Anton Husakou, and Joachim Herrmann  »View Author Affiliations


Optics Express, Vol. 18, Issue 21, pp. 21918-21925 (2010)
http://dx.doi.org/10.1364/OE.18.021918


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Abstract

We study saturable absorption and the nonlinear contribution to the refractive index of metal-nanoparticle composites by using a modified self-consistent Maxwell-Garnett formalism for spherical nanoparticles and a generalization of the discrete-dipole formalism for particles of arbitrary shape and size. The results for fused silica doped with silver nanoparticles show that the saturation of loss of the composites is strongest near the surface plasmon resonance and the saturation intensity is in the range of 10 MW/cm2. The nonlinear refraction index decrease with increasing intensity and its sign depends on frequency and filling factor. The predictions show that metal-nanoparticle composites can be used for mode locking of lasers in a broad spectral range down to 400 nm, where attractive saturable absorbers are still missing.

© 2010 Optical Society of America

OCIS Codes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 30, 2010
Revised Manuscript: September 24, 2010
Manuscript Accepted: September 24, 2010
Published: September 30, 2010

Citation
Kwang-Hyon Kim, Anton Husakou, and Joachim Herrmann, "Saturable absorption in composites doped with metal nanoparticles," Opt. Express 18, 21918-21925 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-21-21918


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