arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.13984physics.optics
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连续介质光栅中束缚态光学双稳

Optical bistability with bound states in the continuum in dielectric gratings

Dmitrii N. Maksimov, Andrey A. Bogdanov, Evgeny N. Bulgakov

摘要:

我们考虑光散射介质光栅支持光学束缚态的连续。由于瞬时克尔非线性的存在,在束缚态的光谱附近的临界场增强触发光学双稳效应。在时间耦合模理论的框架下,从理论上解释了双稳态的发生。作为中心结果,我们把问题转化为单场驱动的非线性振子的形式。理论结果与全波数值模拟进行了比较验证。

英文摘要:

We consider light scattering by dielectric gratings supporting optical bound states in the continuum. Due to the presence of instantaneous Kerr nonlinearity the critical field enhancement in the spectral vicinity of the bound state triggers the effect of optical bistability. The onset of bistability is explained theoretically in the framework of the temporal coupled mode theory. As the central result we cast the problem into the form of a singly field-driven nonlinear oscillator. The theoretical results are verified in comparison against full-wave numerical simulations.

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