论文标题
li2SO4-MGO-P2O5中的非线性光学双折射无定形系统cu离子的影响
Nonlinear optical birefringence in Li2SO4-MgO-P2O5 amorphous system-influence of Cu ions
论文作者
论文摘要
li2SO4-MGO-P2O5玻璃制成了掺杂含有不同含量的CuO（0-1.0 mol％）的Li2SO4-MGO-P2O5玻璃。探索了由高Q-2飞秒脉冲激光引起的光学双折射，作为这些玻璃中铜氧化物浓度的函数。随着铜氧化物含量的增加，光诱导的双折射的大小表现出逐渐减少。通过玻璃网络的聚合来讨论观察到的行为，其程度以占据玻璃基质中TD位点的Cu+离子的浓度上升。然而，含有低含量CUO的样品由Cu2+离子主导，Cu2+离子充当修饰符，并通过破坏P-O-S键来诱导结构缺陷。因此，混合Cuo含量较低的样品更有利地诱发光学双折射的幅度较高。通过电导率，正电子歼灭和超声测量的结果证实了这一结论。
Li2SO4-MgO-P2O5 glasses doped with varied contents of CuO (from 0- 1.0 mol%) were prepared. The optical birefringence induced by a High Q-2 femtosecond pulsed laser is explored as a function of copper oxide concentration in these glasses. The magnitude of the light-induced birefringence exhibited a gradual decrease with the increase of copper oxide content. The observed behavior is discussed in terms of polymerization of the glass network, the degree of which rises with concentration of Cu+ ions occupying Td sites in the glass matrix. However, the samples containing low content of CuO are dominated by Cu2+ ions that act as modifiers and induce structural imperfections by breaking of P-O-S bonds. Accordingly, the samples mixed with lower content of CuO are more favorable for inducing higher magnitudes of the optical birefringence. This conclusion is corroborated by results of electrical conductivity, positron annihilation and ultrasonic measurements.
