Synthesis, structure and characterization of a hybrid centrosymmetric material (4-dimethylaminopyridinium nitrate gallic acid monohydrate) well-designed for non-linear optics

Ennaceur, Nasreddine; Jalel, Boutheina; Henchiri, Rokaya; Cordier, Marie; Ledoux‐Rak, Isabelle

doi:10.1016/j.molstruc.2017.08.105

Cited by 15 publications

(1 citation statement)

References 28 publications

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“…As noted from the photographs in the reports, some compounds can be grown to the millimeter sizes (Amudha et al, 2015;Arumanayagam et al, 2015;Arunkumar & Kalainathan, 2020;Dhanya et al, 2011;Devi & Jananakumar, 2020;Ennaceur et al, 2018;Inbaseelan et al, 2016;Jaishree et al, 2014, Jebapriya et al, 2020Lakshmi et al, 2009;Loganayaki et al, 2011;Shibu Prasad et al, 2018;Santhakumari et al, 2011;Shakir et al, 2009;Sreevani et al, 2013;Thilagarajeswari et al, 2020;. The researchers did not carry out SHG substantiation on a large crystal; however, this is generally not a trivial exercise in laser upconversion measurements of crystals, in particular due to the critical requirements of surface smoothness and proper phase matching.…”

Section: Discussionmentioning

confidence: 99%

SHG in a centrosymmetric crystal – can it be possible?

Tou¹,

Ng²

2021

Acta Crystallogr C

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The present report lists selected publications on centrosymmetric compounds that manifest second harmonic generation responses in a laser, along with a few publications that dispute the laser outcomes. Two studies provide a plausible explanation for this apparent contradiction between second-order nonlinear susceptibility and inversion symmetry: the crystals are noncentrosymmetric and are twinned by inversion. If crystal structures of SHG-active compounds are presented in centrosymmetric settings, the authors of the publications may consider stipulating that the true space group is likely to be one of the noncentrosymmetric sub-space groups.

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