Qiao Xiao-Fen, Li Xiao-Li, Liu He-Nan, Shi Wei, Liu Xue-Lu, Wu Jiang-Bin, Tan Ping-Heng. Periodic oscillation in the reflection and photoluminescence spectra of suspended two-dimensional crystal flakesJ. Acta Physica Sinica, 2016, 65(13): 136801. DOI: 10.7498/aps.65.136801