title: Enhanced second-harmonic generation in AlGaAs/AlxOy tightly confining waveguides and resonant cavities.
abstract: We demonstrate second-harmonic generation (SHG) from sub-micrometer-sized AlGaAs/AlxOy artificially birefringent waveguides. The normalized conversion efficiency is the highest ever reported. We further enhanced the SHG using a waveguide-embedded cavity formed by dichroic mirrors. Resonant enhancements as high as approximately 10x were observed. Such devices could be potentially used as highly efficient, ultracompact frequency converters in integrated photonic circuits.
authors.affiliation: Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: Luigi
authors.initials: L
authors.lastname: Scaccabarozzi
authors.forename: M M
authors.initials: MM
authors.lastname: Fejer
authors.forename: Yijie
authors.initials: Y
authors.lastname: Huo
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Yu
authors.forename: James S
authors.initials: JS
authors.lastname: Harris