Title

Strong nuclear contribution to the optical Kerr effect in niobium oxide containing glasses

Authors

Authors

A. Royon; L. Canioni; B. Bousquet; V. Rodriguez; M. Couzi; C. Rivero; T. Cardinal; E. Fargin; M. Richardson;K. Richardson

Comments

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Abbreviated Journal Title

Phys. Rev. B

Keywords

NONLINEAR REFRACTIVE-INDEX; RAMAN GAIN COEFFICIENTS; TELLURITE GLASSES; CROSS-SECTION; FUSED-SILICA; SCATTERING; SUSCEPTIBILITIES; FIBERS; ORIGIN; Physics, Condensed Matter

Abstract

The electronic and nuclear contributions to nonlinear optical properties of niobium oxide-based glasses have been measured using third-harmonic generation and pump-probe techniques. The results have been found to be in agreement with Hellwarth's model for niobium oxide (Nb2O5) concentrations below 30 mol %. Above 30 mol % Nb2O5, discrepancies with the theoretical model have been observed. It has been found that high niobium ion content induces a change of the local structure within the glass and favors the formation of three-dimensional blocks of corner-sharing NbO6 octahedra. Since similarities with crystalline structures are present, we propose that some specific collective vibrational modes could be at the origin of the extra nuclear contributions to the optical Kerr effect.

Journal Title

Physical Review B

Volume

75

Issue/Number

10

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

6

WOS Identifier

WOS:000245329100036

ISSN

1098-0121

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