Tuning nonlinear second-harmonic generation in AlGaAs nanoantennas via chalcogenide phase change material
Tingting Liu,
Xinyuan Fang,
Shuyuan Xiao
Abstract:The ability to engineer nonlinear optical processes in all-dielectric nanostructures is both of fundamental interest and highly desirable for high-performance, robust, and miniaturized nonlinear optical devices. Herein, we propose a novel paradigm for the efficient tuning of second-harmonic generation (SHG) process in dielectric nanoantennas by integrating with chalcogenide phase change material. In a design with Ge2Sb2Te5 (GST) film sandwiched between the AlGaAs nanoantennas and AlOx substrate, the nonlinear … Show more
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