Acentric compounds with a layered structure are of current interest owing to their advanced functional properties for technical applications. However, the growth of bulk single crystals of acentric materials with a quasi-two-dimensional structure is challenging, which severely hinders the intrinsic properties investigation and optoelectronic applications of these materials. Herein, we report the controlled growth of bulk CdTeMoO₆ single crystals with a layered structure and the investigation of their linear and nonlinear optical properties. High quality CdTeMoO₆ single crystals with dimensions of ∼26 × 10 × 9 mm³ were successfully grown through the modified top-seeded solution growth method using TeO₂-MoO₃ as a flux. The transparent range of CdTeMoO₆ single crystals is in the range of 0.345–5.40 μm, and with large birefringence (Δn = n_o – n_e = 0.2868–0.2219 from 514 nm to 1.5467 μm). In addition, the nonlinear optical (NLO) coefficient d₃₆ of CdTeMoO₆ single crystals was measured to be 8.5 pm/V using Maker Fringe techniques. We also found CdTeMoO₆ is type-I phase-matchable based on the calculated phase-matching curves. Our results indicated that CdTeMoO₆ single crystal is an excellent birefringent material combined with a promising NLO material for optoelectronic applications.

中文翻译：

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具有线性和非线性光学性质的层状无心CdTeMoO ₆单晶的受控生长

具有分层结构的无心化合物由于其在技术应用中的先进功能特性而引起了人们的关注。然而，具有准二维结构的无心材料的块状单晶的生长是具有挑战性的，这严重阻碍了这些材料的固有性质研究和光电应用。在这里，我们报道了具有层状结构的块状CdTeMoO ₆单晶的受控生长及其线性和非线性光学性质的研究。通过使用TeO ₂ -MoO ₃的改进的顶晶溶液生长方法成功地生长了尺寸约为26×10×9 mm ^3的高质量CdTeMoO ₆单晶。作为通量。CdTeMoO ₆单晶的透明范围在0.345–5.40μm的范围内，并且具有大的双折射（从514 nm到1.5467μm的Δn = n _o – n _e = 0.2868–0.2219）。此外，使用Maker Fringe技术测得的CdTeMoO ₆单晶的非线性光学（NLO）系数d ₃₆为8.5 pm / V。根据计算出的相位匹配曲线，我们还发现CdTeMoO ₆是I型相位匹配的。我们的结果表明，CdTeMoO ₆单晶是一种出色的双折射材料，结合了有前途的NLO材料，可用于光电应用。