GaAs盘与悬浮在芯片上的波导之间的临界光耦合
Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip
摘要：
我们报告了一个集成的GaAs盘/波导系统。在芯片上悬置了一个毫米长的波导，在25 μm的长度上逐渐变细，用于与GaAs盘的高Q光学回音壁模进行倏逝耦合。临界耦合制度是通过改变磁盘/引导间隙的距离和悬浮的纳米级锥形的宽度。实验结果与耦合模理论的预测符合得很好。
英文摘要：
We report on an integrated GaAs disk/waveguide system. A millimeter-long waveguide is suspended and tapered on the chip over a length of 25 μm to evanescently couple to high Q optical whispering gallery modes of a GaAs disk. The critical coupling regime is obtained both by varying the disk/guide gap distance and the width of the suspended nanoscale taper. The experimental results are in good agreement with predictions from the coupled mode theory.
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