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Article Dans Une Revue CrystEngComm Année : 2016

Piezoelectric and non-linear optical properties of α-quartz type Si1−xGexO2 single crystals

Bernard Hehlen

Résumé

Single crystals of α-quartz type Si1−xGexO2 with x < 0.2 were grown in 0.05 M NaOH solution. Infrared measurements confirmed that crystals grown at high pressure and high temperature have a low –OH group defect content. After a few millimeters of crystal growth under these conditions, α3500 reaches 0.1 cm−1 and no free –OH are present. The d11 value measured on an X-cut from the crystal with x = 0.0375 is 3.08 pC N−1 (±0.15), in good agreement with the value of 2.97 pC N−1 obtained using density functional theory based calculations. Piezoelectric measurements were performed on the Si1−xGexO2 crystal with x = 0.0375, both at room temperature and after annealing at various temperatures. The piezoelectric signal of the crystal with x = 0.0375 and pure SiO2 disappears after annealing at 635 °C and 545 °C, respectively. Nonlinear optical (NLO) properties of Si1−xGexO2 crystals were measured by Maker's fringe technique on Z-cut χ11(2) and their corresponding values for x = 0.023 and 0.028 are 1.3(2) pm V−1 and 1.6(2) pm V−1, respectively. These values are in good agreement with density functional theory based calculations. The light induced damage threshold values measured on Si1−xGexO2 crystals with x = 0.023 and 0.028 are very similar to that of α-quartz.

Domaines

Matériaux
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Dates et versions

hal-01307454 , version 1 (26-04-2016)

Identifiants

Citer

Damien Clavier, Mythili Prakasam, Alain Largeteau, Jean-Jacques Boy, Bernard Hehlen, et al.. Piezoelectric and non-linear optical properties of α-quartz type Si1−xGexO2 single crystals. CrystEngComm, 2016, 18 (14), pp.2500-2508. ⟨10.1039/C5CE02477C⟩. ⟨hal-01307454⟩
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