title: Heterogeneously integrated long-wavelength VCSEL using silicon high contrast grating on an SOI substrate.
abstract: We report an electrically pumped hybrid cavity AlGaInAs-silicon long-wavelength VCSEL using a high contrast grating (HCG) reflector on a silicon-on-insulator (SOI) substrate. The VCSEL operates at silicon transparent wavelengths ~1.57 μm with >1 mW CW power outcoupled from the semiconductor DBR, and single-mode operation up to 65 °C. The thermal resistance of our device is measured to be 1.46 K/mW. We demonstrate >2.5 GHz 3-dB direct modulation bandwidth, and show error-free transmission over 2.5 km single mode fiber under 5 Gb/s direct modulation. We show a theoretical design of SOI-HCG serving both as a VCSEL reflector as well as waveguide coupler for an in-plane SOI waveguide, facilitating integration of VCSEL with in-plane silicon photonic circuits. The novel HCG-VCSEL design, which employs scalable flip-chip eutectic bonding, may enable low cost light sources for integrated optical links.
authors.forename: James
authors.initials: J
authors.lastname: Ferrara
authors.forename: Weijian
authors.initials: W
authors.lastname: Yang
authors.forename: Li
authors.initials: L
authors.lastname: Zhu
authors.forename: Pengfei
authors.initials: P
authors.lastname: Qiao
authors.forename: Connie J
authors.initials: CJ
authors.lastname: Chang-Hasnain