| Institution: | College of Physics, Hebei Normal University, Shijiazhuang 050016, China; Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China; Zhangjiakou Vocational and Technical College, Zhangjiakou 075051, China;College of Physics, Hebei Normal University, Shijiazhuang 050016, China; Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China;College of Physics, Hebei Normal University, Shijiazhuang 050016, China; Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China;College of Physics, Hebei Normal University, Shijiazhuang 050016, China; Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China;College of Physics, Hebei Normal University, Shijiazhuang 050016, China; Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China |
