Title

Strong Nuclear Contribution To The Optical Kerr Effect In Niobium Oxide Containing Glasses

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 (Nb2 O5) concentrations below 30 mol %. Above 30 mol % Nb2 O5, 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. © 2007 The American Physical Society.

Publication Date

3-27-2007

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Volume

75

Issue

10

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevB.75.104207

Socpus ID

33947685005 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33947685005

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