Ultraviolet Laser Action in Ferromagnetic Zn1-xFexO Nanoneedles.
Fe-doped ZnO nanoneedles (NDs) were fabricated by an Ar+ ion sputtering technique operated at room temperature. The as-grown samples show both ferromagnetic and lasing properties. The saturated magnetization moment was measured from 0.307 to 0.659 emu cm-3 at the field of 10 kOe with various Fe concentrations. Intense ultraviolet random lasing emission was observed from Zn1 - xFexO NDs at room temperature. The X-ray photoelectron spectroscopy result reveals that the doped Fe atoms occupy the Zn sites and lead to a decrease in oxygen deficiency.
Yang
Hy
H
School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang, 639798, Singapore. hyyang@ntu.edu.sg.
Yu
Sf
S
Lau
Sp
S
Herng
Ts
Ts
Tanemura
M
M