Chang, Y.-M.Y.-M.ChangHong, Y.-L.Y.-L.HongGwo, S.S.Gwo2020-06-112020-06-11200800036951https://scholars.lib.ntu.edu.tw/handle/123456789/501554Direct probe of the built-in electric field of Mg-doped a -plane wurtzite InN surfaces with time-resolved electric-field-induced second harmonic generationjournal article10.1063/1.2979238