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Hybrid Approach Enables Ultralow-Loss Integrated Photonics for Lidar

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Researchers at École Polytechnique Fédérale de Lausanne (EPFL) and Purdue University demonstrated a hybrid approach to on-chip acousto-optic modulation by combining piezoelectric aluminium nitride technology with ultralow-loss silicon nitride integrated photonics. The hybrid circuit allows wideband actuation on photonic waveguides with ultralow electrical power. A key feature is that it maintains the ultralow loss of silicon nitride circuits. Silicon nitride has emerged as a leading material for chip-scale, microresonator-based optical frequency combs (microcombs)....Read full article

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    Published: July 2020
    Glossary
    acousto-optics
    Discipline within optical physics that addresses sound vibration, phonon effects and their influencing behavior within optical elements and systems.
    lidar
    An acronym of light detection and ranging, describing systems that use a light beam in place of conventional microwave beams for atmospheric monitoring, tracking and detection functions. Ladar, an acronym of laser detection and ranging, uses laser light for detection of speed, altitude, direction and range; it is often called laser radar.
    optoelectronics
    Optoelectronics is a branch of electronics that focuses on the study and application of devices and systems that use light and its interactions with different materials. The term "optoelectronics" is a combination of "optics" and "electronics," reflecting the interdisciplinary nature of this field. Optoelectronic devices convert electrical signals into optical signals or vice versa, making them crucial in various technologies. Some key components and applications of optoelectronics include: ...
    Research & TechnologyeducationEuropeAmericasPurdue UniversityÉcole Polytechnique Fédérale de LausanneLight SourcesMaterialsOpticsacousto-opticsphotoacousticsfrequency combsmicrocombintegrated photonicssilicon photonicssolitonslidarLaserspiezoelectricoptoelectronicsThe News Wire

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