The emphases of our research works are as follows : under ultra - low temperature ( about 0 . 236k ) conditions , how the frequency and power of the saw and the source drain voltage influence the acoustic current ; and the relationship between the source drain current and the split - gate voltage ; and how to find the cut off voltage of the quasi - 1d electron channel ; and also the frequency character of the idt in the saw parts 研究的重點為,在甚低溫( 0 . 236k )下,通過實驗研究表面聲波的頻率和功率,源漏偏壓等因素對聲電電流的影響;研究準一維電子通道中不同源漏電流與分裂門負偏壓的關系,以找到分裂門的鉗斷點電壓;以及研究聲表面器件叉指換能器的頻率特性等。