论文标题
介电元表中的界限的光学机械调制光谱
Optomechanical Modulation Spectroscopy of Bound-States-In-The-Continuum in a dielectric metasurface
论文作者
论文摘要
可以通过高级时域光谱技术检测光子和电子设备中的难以捉摸的功能。在这封信中，我们基于光子和机械模式的光力相互作用引入了一种新型的调制光谱。将技术应用于Si metasurface及其类似鼓的机械模式，我们检测到接近正常发生率的窄带准结合状态（Q-BIC）模式，在这种情况下，高对称性保护和不希望的背景模式可以阻止其测量值。显示了多个数量级的可见性增强，光力学调制光谱可以是一种创新的工具，用于精确光谱范围，包括测量纯对称性受保护的BIC共振的目标。
Elusive features in photonic and electronic devices can be detected by means of advanced, time-domain spectroscopic techniques. In this letter we introduce a novel kind of modulation spectroscopy, based on the optomechanical interaction of photonic and mechanical modes. Applying the technique to a Si metasurface and its drum-like mechanical modes, we detect narrow-band quasi-Bound-State-in-the-Continuum (q-BIC) modes close to normal incidence, where their measurement can be hindered by a high symmetry protection and undesired background modes. Showing a visibility enhancement of more than one order of magnitude, the optomechanical modulation spectroscopy can be an innovative tool for precise spectroscopy of a wide set of photonic devices, including the goal of measuring purely symmetry protected BIC resonances.
