title: Self-aligned nanoislands nanobeam bandedge lasers.
abstract: We propose and demonstrate a novel one-dimensional nanobeam bandedge laser constituted by self-aligned nanoisland quantum-well (QW) structures. The formation of self-aligned InGaAsP nanoislands sandwiched between two InP claddings is the result of selective removal of QW through wet-etching processes. By controlling wet-etching time, we show a good spatial and spectral overlap between the dielectric mode and the self-aligned nanoisland structures leads to the realization of nanobeam bandedge lasers with low-threshold operations and high slope efficiencies. Optical characterization results indicate a strong correlation between the size of individual nanoisland and the threshold power of our nanobeam bandedge lasers. We obtain an approximately 81% reduction in the absorbed threshold power as we optimize the size of the nanoislands.
authors.forename: Putu
authors.initials: P
authors.lastname: Pramudita
authors.forename: Hoon
authors.initials: H
authors.lastname: Jang
authors.forename: Indra
authors.initials: I
authors.lastname: Karnadi
authors.forename: Hwi-Min
authors.initials: HM
authors.lastname: Kim
authors.forename: Yong-Hee
authors.initials: YH
authors.lastname: Lee