The zero-order waveplates, the essential materials in altering the polarization state of optical waves, are significant in polarimetry and the laser industry. Restricted by birefringence and absorption edge, few materials can have moderately small birefringence (Δn < 0.01) and a deep-ultraviolet (DUV; λ < 200 nm) transparency range. We used the B₃O₃F₆ unit for designing the zero-order waveplate material, which is composed of three BO₂F₂ tetrahedra interconnected by corner sharing. Here we obtained a new Cs₃B₃O₃F₆ compound with the isolated B₃O₃F₆ unit by a high-temperature solution method, which has the DUV cutoff edge and suitable birefringence (0.0069 at 532 nm) based on the experimental and computational results. This demonstrates that the isolated B₃O₃F₆ unit is a potential group, which favors the search for suitable compounds for DUV zero-order waveplate materials.

中文翻译：

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具有深紫外截止边缘和合适的双折射作为潜在零阶波片材料的Cs3B3O3F6。

零阶波片是改变光波偏振态的基本材料，在偏振法和激光工业中具有重要意义。受双折射和吸收边缘的限制，很少有材料可以具有适度小的双折射（Δn <0.01）和深紫外线（DUV;λ<200 nm）透明范围。我们使用B ₃ O ₃ F ₆单元设计零阶波片材料，该材料由三个BO ₂ F ₂四面体通过拐角共享互连而成。在这里，我们获得了具有分离的B ₃ O的新Cs ₃ B ₃ O ₃ F ₆化合物根据实验和计算结果，采用高温溶液法制备的₃ F ₆单元具有DUV截止边缘和合适的双折射（在532 nm处为0.0069）。这表明分离出的B ₃ O ₃ F ₆单元是一个潜在基团，有利于寻找适合DUV零阶波片材料的化合物。