Ullrich, Bruno; Singh, Akhilesh K.; Barik, Puspendu; Xi, Haowen; Bhowmick, Mithun
(Optics letters, 2015-06-01)
The intrinsic photoluminescence Stokes shift, i.e., the energy difference between optical band gap and emission peak, of 350 μm thick semi-insulating GaAs wafers is found to be 4 meV at room temperature. The result is based ...