Raman section rules for the configuration used in the present experiments. X, Y, and Z are parallel to the (21¯1¯0), (011¯0), and (0001) direction of GaN film, respectively. Configuration Allowed modes Z(X-)Z¯ X(Y-)X¯ X(Z-)X¯ 我应该怎么做才可以得到Z(X-)Z¯ X(Y-)X¯ X(Z-)X¯的极化方向的偏振模式呢???/ 小弟 虚心请教