title: Electrically pumped wavelength-tunable ultraviolet random lasing from Mg(x)Zn(1-x)O films on Si.
abstract: We report the electrically pumped wavelength-tunable ultraviolet random lasing from Mg(x)Zn(1-x)O films with different bandgap energies, which act as the semiconductor components in metal-insulator- semiconductor (MIS) structures fabricated on Si substrates. When the metal (Au herein) gates of the MIS structures are applied with sufficiently high positive voltages, random lasing from the Mg(x)Zn(1-x)O films occurs, featuring a series of narrow spikes in the emitted spectra. Overall, the central wavelength of the random lasing spectrum is tuned from approximately 377 to 352 nm with the increase of x value in Mg(x)Zn(1-x)O from 0 to 0.35. The mechanism for the electrically pumped random lasing has been tentatively elucidated taking into account both the multiple optical scattering and the optical gain proceeding in the Mg(x)Zn(1-x)O films.
authors.affiliation: State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Ma
authors.forename: Peiliang
authors.initials: P
authors.lastname: Chen
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Deren
authors.initials: D
authors.lastname: Yang
mesh_terms: D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D008567:Membranes, Artificial; D014466:Ultraviolet Rays
chemical_list: D008567:Membranes, Artificial