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Enhanced nonlinear optical properties of oxygen deficient lead-niobium-germanate film glasses

AuthorsGonzalo de los Reyes, José; Fernández Martínez, Héctor ; Solís Céspedes, Javier ; Muñoz-Martín, David ; Fernández Navarro, José María ; Afonso, Carmen N. ; García Fierro, José Luis
Keywords[PACS] Glasses, quartz
[PACS] Optical coatings
[PACS] Optical susceptibility, hyperpolarizability
[PACS] Beam trapping, self-focusing and defocusing; self-phase modulation
[PACS] Disordered structures
Issue Date19-Jun-2007
PublisherAmerican Institute of Physics
CitationApplied Physics Letters, 90 (25) : 251907 (2007)
AbstractThe third order nonlinear optical properties of oxygen deficient lead-niobium-germanate film glasses with heavy metal contents beyond that of the bulk glass formation region have been investigated. Values of the nonlinear third order optical susceptibility up to /χ(³)/ ≈ 1.8×10⁻¹¹ esu have been measured by degenerate four wave mixing at 800 nm in films having large heavy metal fractions (0.93). The fast buildup and decay times ( ≈ 130 fs) of the nonlinear response confirm its nonresonant character. The partial reduction of Nb⁵+ to Nb4+ evidenced by x-ray photoelectron spectroscopy, which is associated with the oxygen deficiency, appears to be responsible for the strong enhancement of /χ(³)/.
Description3 pags. ; 3 figs. ; 1 tab.
Publisher version (URL)http://dx.doi.org/10.1063/1.2749837
Appears in Collections:(CFMAC-IO) Artículos
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