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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 12 — Jun. 8, 2009
  • pp: 10056–10068

Modification of the nonlinear optical absorption and optical Kerr response exhibited by nc-Si embedded in a silicon-nitride film

A. López-Suárez, C. Torres-Torres, R. Rangel-Rojo, J. A. Reyes-Esqueda, G. Santana, J. C. Alonso, A. Ortiz, and A. Oliver  »View Author Affiliations


Optics Express, Vol. 17, Issue 12, pp. 10056-10068 (2009)
http://dx.doi.org/10.1364/OE.17.010056


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Abstract

We studied the absorptive and refractive nonlinearities at 532 nm and 26 ps pulses for silicon-nitride films containing silicon nanoclusters (nc-Si) prepared by remote plasma-enhanced chemical vapor deposition (RPECVD). Using a self-diffraction technique, we measured for the as-grown sample β=7.7×10-9m/W, n2=1.8×10-16m2/W, and |χ(3)1111|=4.6×10-10esu; meanwhile, when the sample was exposed to an annealing process at 1000°C during one hour in a nitrogen atmosphere, we obtained β=-5×10-10m/W, n2=9×10-17m2/W, and |χ(3)1111|=1.1×10-10esu. A pure electronic nonlinear refraction was identified and a large threshold ablation of 41 J/cm2 was found for our films. By fitting nonlinear optical transmittance measurements, we were able to estimate that the annealed sample exhibits a response time close to 1 fs. We report an enhancement in the photoluminescence (PL) signal after the annealing process, as well as a red-shift due to an increment in size of the nc-Si during the thermal process.

© 2009 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.3270) Nonlinear optics : Kerr effect
(160.4236) Materials : Nanomaterials

ToC Category:
Nonlinear Optics

History
Original Manuscript: January 5, 2009
Revised Manuscript: March 18, 2009
Manuscript Accepted: March 25, 2009
Published: June 1, 2009

Citation
A. López-Suárez, C. Torres-Torres, R. Rangel-Rojo, J. A. Reyes-Esqueda, G. Santana, J. C. Alonso, A. Ortiz, and A. Oliver, "Modification of the nonlinear optical absorption and optical Kerr response exhibited by nc-Si embedded in a silicon-nitride film," Opt. Express 17, 10056-10068 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-12-10056


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