(4-F-BTAB)ReO4, (4-Cl-BTAB)ReO4, and (4-Br-BTAB)ReO4 (BTAB = para-halobenzyltrimethylammoniun), which show illustrious high-contrast “off-on–off” SHG conversion over a broad temperature range. The precise halogen modification of cations not only achieves significant SHG signal intensity (1.08 × KDP–3.23 × KDP) but also elevates phase transition temperatures from 415.5 to 474.4 K. Notably, (4-Br-BTAB)ReO4 demonstrates
在光学和量子计算领域,二次谐波产生(S
HG)是光信号处理和量子信息处理中有价值的非线性光学元件。在此,我们报告了一系列创新的非线性光学(NLO)材料,表示为(4-F-
BTAB)ReO 4、(4-Cl-
BTAB)ReO 4和(4-Br-
BTAB)ReO 4 (
BTAB =对卤代
苄基三甲基铵),在较宽的温度范围内表现出出色的高对比度“关-开-关”S
HG 转换。阳离子的精确卤素修饰不仅实现了显着的 S
HG 信号强度 (1.08 × KDP–3.23 × KDP),而且还将相变温度从 415.5 K 提高到 474.4 K。值得注意的是,(4-Br-
BTAB)ReO 4 表现出更高的S
HG-活性态增加了近 60 K,宽带隙为 3.646 eV,压电响应性能增强为 2.25 V。这项研究有助于可切换 NLO 材料的多样化。