title: On-Chip Integrated Quantum-Dot-Silicon-Nitride Microdisk Lasers.
abstract: Hybrid silicon nitride (SiN)-quantum-dot (QD) microlasers coupled to a passive SiN output waveguide with a 7 µm diameter and a record-low threshold density of 27 µJ cm-2are demonstrated. A new design and processing scheme offers long-term stability and facilitates in-depth QD material and device characterization, thereby opening new paths for optical communication, sensing, and on-chip cavity quantum optics based on colloidal QDs.
authors.affiliation: Photonics Research Group and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Technologiepark-Zwijnaarde 15 iGent, 9052, Ghent, Belgium.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Xie
authors.affiliation: IBM Research-Zurich, Säumerstrasse 4, 8803, Rüschlikon, Switzerland.
authors.forename: Thilo
authors.initials: T
authors.lastname: Stöferle
authors.affiliation: IBM Research-Zurich, Säumerstrasse 4, 8803, Rüschlikon, Switzerland.
authors.forename: Gabriele
authors.initials: G
authors.lastname: Rainò
authors.affiliation: Physics and Chemistry of Nanostructures and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium.
authors.forename: Tangi
authors.initials: T
authors.lastname: Aubert
authors.affiliation: Physics and Chemistry of Nanostructures and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Bisschop
authors.affiliation: Photonics Research Group and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Technologiepark-Zwijnaarde 15 iGent, 9052, Ghent, Belgium.
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: IBM Research-Zurich, Säumerstrasse 4, 8803, Rüschlikon, Switzerland.
authors.forename: Rainer F
authors.initials: RF
authors.lastname: Mahrt
authors.affiliation: Physics and Chemistry of Nanostructures and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium.
authors.forename: Pieter
authors.initials: P
authors.lastname: Geiregat
authors.affiliation: Physics and Chemistry of Nanostructures and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium.
authors.forename: Edouard
authors.initials: E
authors.lastname: Brainis
authors.affiliation: Physics and Chemistry of Nanostructures and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium.
authors.forename: Zeger
authors.initials: Z
authors.lastname: Hens
authors.affiliation: Photonics Research Group and Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Technologiepark-Zwijnaarde 15 iGent, 9052, Ghent, Belgium.
authors.forename: Dries
authors.initials: D
authors.lastname: Van Thourhout
keywords: colloidal quantum dots; microdisks; on-chip lasers; silicon nitride photonics