We point out that the electro-optic modulation of the bound state in the continuum in a low-index dielectric-loaded slab LiNbO3${{\rm LiNbO}_3}$ waveguide reported by Yu et al., [Optica 6, 1342 (2019) [CrossRef] ] is treated incorrectly. According to our analysis based on both the perturbation approach and numerical simulation, the electro-optic modulation is more than an order of magnitude less efficient than the authors claim. It thus remains unclear how the experimental results described in the paper were obtained.

中文翻译：

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具有连续体束缚态的光子集成电路：评论

我们指出，Yu等人在 [Optica 6 ,${{\rm LiNbO}_3}$ 1342 ( 2019 ) [CrossRef ] ] 被错误地对待。根据我们基于微扰方法和数值模拟的分析，电光调制的效率比作者声称的低一个数量级以上。因此，目前尚不清楚论文中描述的实验结果是如何获得的。