title: Hybrid integration of III-V semiconductor lasers on silicon waveguides using optofluidic microbubble manipulation.
abstract: Optofluidic manipulation mechanisms have been successfully applied to micro/nano-scale assembly and handling applications in biophysics, electronics, and photonics. Here, we extend the laser-based optofluidic microbubble manipulation technique to achieve hybrid integration of compound semiconductor microdisk lasers on the silicon photonic circuit platform. The microscale compound semiconductor block trapped on the microbubble surface can be precisely assembled on a desired position using photothermocapillary convective flows induced by focused laser beam illumination. Strong light absorption within the micro-scale compound semiconductor object allows real-time and on-demand microbubble generation. After the assembly process, we verify that electromagnetic radiation from the optically-pumped InGaAsP microdisk laser can be efficiently coupled to the single-mode silicon waveguide through vertical evanescent coupling. Our simple and accurate microbubble-based manipulation technique may provide a new pathway for realizing high precision fluidic assembly schemes for heterogeneously integrated photonic/electronic platforms as well as microelectromechanical systems.
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Youngho
authors.initials: Y
authors.lastname: Jung
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Jaeho
authors.initials: J
authors.lastname: Shim
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Kyungmook
authors.initials: K
authors.lastname: Kwon
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Jong-Bum
authors.initials: JB
authors.lastname: You
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Kyunghan
authors.initials: K
authors.lastname: Choi
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
authors.forename: Kyoungsik
authors.initials: K
authors.lastname: Yu