"X. Q. Zhang,Z. K. Tang,M. Kawasaki,A. Ohtomo,H. Koinuma","Second harmonic generation in self-assembled ZnO microcrystallite thin films",,"Thin Solid Films",,"Vol. 450","No. 2","pp. 320-323",2004,Mar.
"X. Q. Zhang,Z. Tang,M. Kawasaki,A. Ohtomo,H. Koinuma","Optical gain in self-assembled ZnO microcrysallite thin films",,"Journal of Crystal Growth",,"Vol. 259","No. 3","pp. 286-290",2003,Dec.
"Xiqing Zhang,Z. K. Tang,M. Kawasaki,A. Ohtomo,H. Koinuma","Resonant exciton second-harmonic generation in self-assembled ZnO microcrystallite thin films",,"Journal of Physics-Condensed Matter",,"Vol. 15","No. 30","pp. 5191-5196",2003,Aug.