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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 19 — Oct. 1, 2012
  • pp: 4116–4118

Directionally selective optical limiting of femtosecond pulses in simple transparent two-layer systems

Sabitha Mohan, Heinrich Graener, and Gerhard Seifert  »View Author Affiliations


Optics Letters, Vol. 37, Issue 19, pp. 4116-4118 (2012)
http://dx.doi.org/10.1364/OL.37.004116


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Abstract

Directionally selective nonlinear transmission behavior has been observed for simple glass-based two-layer systems in Z -scan experiments employing femtosecond pulses at a wavelength of λ = 800 nm . Glass sheets of 1 mm thickness with a very thin surface layer ( 2 μm ) containing spherical Ag nanoparticles have been studied. In these samples, irradiating from the substrate side causes a strong transmission decrease via self-focusing of the beam and subsequent two-photon absorption in the thin layer, whereas the reverse direction may pass the sample without loss. This anisotropic optical limiting is discussed in terms of a numerical model in the limit of thin samples with respect to the Rayleigh range of the laser beam.

© 2012 Optical Society of America

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 19, 2012
Manuscript Accepted: August 29, 2012
Published: September 28, 2012

Citation
Sabitha Mohan, Heinrich Graener, and Gerhard Seifert, "Directionally selective optical limiting of femtosecond pulses in simple transparent two-layer systems," Opt. Lett. 37, 4116-4118 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-19-4116

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