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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28655–28663

Surface plasmon assisted optical nonlinearities of uniformly oriented metal nano-ellipsoids in glass

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


Optics Express, Vol. 20, Issue 27, pp. 28655-28663 (2012)
http://dx.doi.org/10.1364/OE.20.028655


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Abstract

The nonlinear optical properties of nanocomposites consisting of non-spherical silver nanoparticles in glass matrix have been studied using the femtosecond Z-scan technique. The spheroidal nanoparticles were uniformly oriented along a common direction. By polarization sensitive studies, longitudinal and transverse plasmon resonances can be addressed separately. A sign reversal in optical nonlinearity from negative to positive is observed while switching the light interaction from near to non-resonant regime, which can be done by simply rotating the light polarization by 90°. Studying samples with different aspect ratio, we obtained the dispersion of third-order nonlinearity in the near-resonant regime, showing an enhancement of the nonlinear processes by more than two orders of magnitude due to the electric field enhancement at the surface plasmon resonance.

© 2012 OSA

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(190.4400) Nonlinear optics : Nonlinear optics, materials
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 12, 2012
Revised Manuscript: November 13, 2012
Manuscript Accepted: November 13, 2012
Published: December 10, 2012

Citation
Sabitha Mohan, Jens Lange, Heinrich Graener, and Gerhard Seifert, "Surface plasmon assisted optical nonlinearities of uniformly oriented metal nano-ellipsoids in glass," Opt. Express 20, 28655-28663 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-27-28655


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