Optical non-linearity in oxide glasses

Fargin, Evelyne; Berthereau, A.; Cardinal, Thierry; Flem, G. Le; Ducasse, Laurent; Canioni, Lionel; Segonds, Patricia; Sarger, L.; Ducasse, A.

doi:10.1016/0022-3093(96)00338-9

Cited by 95 publications

(58 citation statements)

References 9 publications

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“…[1][2][3] The origin of these high values is not fully established yet. Using a combination of experimental techniques (interferometric measurements) and ab initio calculations (within the restricted Hartree-Fock scheme), some authors 4 suggested that the highly polarizable 5s 2 electronic lone pair of Te (IV) could be responsible for the high NLO indices. Other theoretical works, 5,6 based on the use of hybrid functionals within the density functional theory (DFT), reinforced this idea by demonstrating the importance of the Te (IV) lone pair on the hyperpolarizabilities of isolated TeO 4 and TeO 3 structural units.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of TeO2crystalline phases from first principles

et al. 2011

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We have computed second and third nonlinear optical susceptibilities of two crystalline bulk tellurium oxide polymorphs: α-TeO 2 (the most stable crystalline bulk phase) and γ -TeO 2 (the crystalline phase that ressembles the more to the glass phase). Third-order nonlinear susceptibilities of the crystalline phases are two orders of magnitude larger than α-SiO 2 cristoballite, thus extending the experimental observations on glasses to the case of crystalline compounds. While the electronic lone pairs of Te contribute to those large values, a full explanation of the anisotropy of the third-order susceptibility tensor requires a detailed analysis of the structure, in particular, the presence of helical chains, that seems to be linked to cooperative nonlocal polarizabilty effects.

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Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of TeO2crystalline phases from first principles

et al. 2011

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“…In the case of tellurite glasses, the high hyperpolarizability of TeO 2 has been attributed to the empty 5d orbitals 26 or to the electron lone pair at the Te atom. 28 XPS analysis confirms no changes in the Te atomic content or in the oxidation state of Te and thus, we do not expect any additional contribution to ͉ ͑3͒ ͉ from these factors. Recent ab initio calculations 33 have related the hyperpolarizability of TeO 2 glass to electron delocalization in ͑TeO 2 ͒ n chainlike structures, which suggests that the structural differences observed in the film glasses may be responsible of the enhancement of the nonlinear response.…”

Section: Discussionmentioning

confidence: 60%

“…Previous results in bulk TeO 2 -TiO 2 glasses have shown that the increase in the TiO 2 content contributes to increase the linear and nonlinear refractive index of glasses due to the large polarizability of the empty d-orbital in Ti 4+ . 22,[25][26][27][28] However, n decreases in the case of films as shown in Fig. 2.…”

Section: Discussionmentioning

confidence: 99%

Nonlinear optical susceptibility of multicomponent tellurite thin film glasses

Muñoz-Martín¹,

Fernández²,

Fernández-Navarro³

et al. 2008

Journal of Applied Physics

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Tellurite ͑TeO 2 -TiO 2 -Nb 2 O 5 ͒ thin film glasses have been produced by pulsed laser deposition. The dispersion of the real and imaginary parts of the linear refractive index has been measured in the range from 300 to 1700 nm. Films present high refractive index ͑n = 2.01͒ and reduced absorption ͑k Ͻ 10 −4 ͒ at = 1500 nm. The nonlinear third order optical susceptibility ͉͑ ͑3͒ ͉͒ has been determined at four different wavelengths ͑600, 800, 1200, and 1500 nm͒. The out-of-resonance ͉ ͑3͒ ͉ values ͑ϳ10 −12 esu͒ are found to be ten times higher than those of the bulk glass and 10 2 times higher than that of silica. Compositional and structural analysis reveals an increase of both the Ti atomic content and the fraction of nonbridging oxygen bonds in the deposited films. Both factors lead to a higher hyperpolarizability of the film constituents that is proposed to be responsible for the high ͉ ͑3͒ ͉ value of the films.

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“…Among tellurite glasses, the glasses based on WO 3 , PbO, and other heavy-metal oxides (HMO) are known to have high linear refractive indices (n > 2.1) [5][6][7]. The high linear refractive index of Te +4 containing glasses is attributed to the nonbonding lone electron pair 5s 2 of tellurium [8].…”

Section: Introductionmentioning

confidence: 99%