论文标题
在奈伯特锂膜光子晶体中激发对称性保护模式的感应应用
Excitation of Symmetry Protected Modes in a Lithium Niobate Membrane Photonic Crystal for Sensing Applications
论文作者
论文摘要
我们的理论研究揭示了开发基于电场传感器的机会的机会，我们对对称模式（SPM）的开发激发了对对称性的模式（SPM），这些模式（SPM）在电光材料中激发了对称模式（SPM），即Niobate（LN）。 SPM由黑暗的风扇状共振组成，从光子晶体（PHC）的离散BLOCH模式与膜模式的结合进行了重新，它们都是在LN中制成的。深色特征是具有高度对称性的结构几何形状。因此，由于在小斜发生率下的照明率打破了配置的对称性，因此SPM激发可疯狂。这导致在电信频谱范围内，几种超敏感和可调的类似Fano样共振降低了10^5的质量因子。其中一些共鸣是在LN内部具有高度限制的电场。这种限制允许增强电声孔效应的效果，其因子高达4x10^5，从而加剧了设计的传感器的检测敏感性。
Our theoretical study reveals the opportunity to develop an electric field sensor basedon the exploitation of Symmetry Protected Mode (SPM) that we excite within an electro-opticalmaterial, namely lithium niobate (LN). The SPM consists of a dark Fano-like resonance thatresults from the combination of a discrete Bloch mode of a Photonic Crystal (PhC) with acontinuum mode of a membrane, both of them made in LN. The dark character is linked tothe structure geometry having a high degree of symmetry. The SPM excitation is then madepossible thanks to an illumination under small oblique incidence which breaks the symmetry ofthe configuration. This results in several ultra-sensitive and tunable Fano-like resonances withhigh quality factors up to 10^5 in the telecoms spectral range. Some of these resonances providemodes with a highly confined electric field inside LN. This confinement allows the enhancementof the electro-optic Pockels effect by a factor up to 4x10^5, thus exacerbating the detectionsensitivity of the designed sensor.
