For the two-mode laser case the influence of the mode coupling to the first-order-like transition can not been neglected.
在双模光场情形，模间耦合对产生一阶类相变的影响不可忽略。
The second-order NLO properties of a series of tri-nuclear transition metal clusters with incomplete cubane-like structures were studied by using the first-principle quantum chemical method.
研究了具有欠完整立方烷构型的过渡金属原子簇分子的二阶非线性光学性质。
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