Title :
Carrier and exciton spin dynamics in Cu-doped ZnO nanowires
Author :
Sum, Tze Chien ; Xing, Guozhong ; Xing, Guichuan ; Sie, Edbert Jarvis ; Wu, Tom ; Huan, Cheng Hon Alfred
Author_Institution :
Div. of Phys. & Appl. Phys., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
Time resolved photoluminescence and transient absorption spectroscopy reveal an ultrafast charge transfer process, occurring within 39 ± 9 ps, between the ZnO host and the Cu dopants in Cu-doped ZnO nanowires. Optical orientation experiments reveal a long-lived, highly spin-polarized excitonic emission from this system.
Keywords :
II-VI semiconductors; copper; excitons; nanowires; optical materials; photoluminescence; spin dynamics; time resolved spectra; zinc compounds; Cu-doped ZnO nanowires; ZnO:Cu; carrier dynamics; exciton spin dynamics; spin-polarized excitonic emission; time 39 ps; time resolved photoluminescence; transient absorption spectroscopy; ultrafast charge transfer; Charge transfer; Computed tomography; Copper; Doping; Nanowires; Transient analysis; Zinc oxide;
Conference_Titel :
Photonics Conference (PHO), 2011 IEEE
Conference_Location :
Arlington, VA
Print_ISBN :
978-1-4244-8940-4
DOI :
10.1109/PHO.2011.6110519
