title: Ultraviolet random lasing action from highly disordered n-AlN/p-GaN heterojunction.
abstract: Room-temperature random lasing is achieved from an n-AlN/p-GaN heterojunction. The highly disordered n-AlN layer, which was deposited on p-GaN:Mg layer via radio frequency magnetron sputtering, acts as a scattering medium to sustain coherent optical feedback. The p-GaN:Mg layer grown on sapphire provides optical amplification to the scattered light propagating along the heterojunction. Hence, lasing peaks of line width less than 0.4 nm are emerged from the emission spectra at round 370 nm for the heterojunction under forward bias larger than 5.1 V. Lasing characteristics of the heterojunction are in agreement with the behavior of random lasers.
authors.affiliation: Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 279623. yanghuiying@sutd.edu.sg
authors.forename: H Y
authors.initials: HY
authors.lastname: Yang
authors.forename: S F
authors.initials: SF
authors.lastname: Yu
authors.forename: J I
authors.initials: JI
authors.lastname: Wong
authors.forename: Z H
authors.initials: ZH
authors.lastname: Cen
authors.forename: H K
authors.initials: HK
authors.lastname: Liang
authors.forename: T P
authors.initials: TP
authors.lastname: Chen