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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 18 — Aug. 29, 2011
  • pp: 16985–16995

Highly efficient THG in TiO2 nanolayers for third-order pulse characterization

Susanta Kumar Das, Christoph Schwanke, Andreas Pfuch, Wolfgang Seeber, Martin Bock, Günter Steinmeyer, Thomas Elsaesser, and Ruediger Grunwald  »View Author Affiliations


Optics Express, Vol. 19, Issue 18, pp. 16985-16995 (2011)
http://dx.doi.org/10.1364/OE.19.016985


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Abstract

Third harmonic generation (THG) of femtosecond laser pulses in sputtered nanocrystalline TiO2 thin films is investigated. Using layers of graded thickness, the dependence of THG on the film parameters is studied. The maximum THG signal is observed at a thickness of 180 nm. The corresponding conversion efficiency is 26 times larger compared to THG at the air-glass interface. For a demonstration of the capabilities of such a highly nonlinear material for pulse characterization, third-order autocorrelation and interferometric frequency-resolved optical gating (IFROG) traces are recorded with unamplified nanojoule pulses directly from a broadband femtosecond laser oscillator.

© 2011 OSA

OCIS Codes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Nonlinear Optics

History
Original Manuscript: June 29, 2011
Revised Manuscript: August 4, 2011
Manuscript Accepted: August 4, 2011
Published: August 15, 2011

Citation
Susanta Kumar Das, Christoph Schwanke, Andreas Pfuch, Wolfgang Seeber, Martin Bock, Günter Steinmeyer, Thomas Elsaesser, and Ruediger Grunwald, "Highly efficient THG in TiO2 nanolayers for third-order pulse characterization," Opt. Express 19, 16985-16995 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-18-16985


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