论文标题
从弗里德里希温特根结合状态中的超级腔共振的极化选择性调制
Polarization Selective Modulation of the Supercavity Resonance from Friedrich-Wintgen Bound States in the Continuum
论文作者
论文摘要
广泛研究了连续体（BIC）中的结合状态，以限制光线的能力，引起尖锐的传感应用共振，并作为具有拓扑特征的激光作用的途径。最近的实验表明，存在于$γ$ \ \ $γ$ \点以对称性保护的BIC，Freidrich-Wintgen（FW）BICS无法获得的异国情调模式。在先前的作品中，FW BIC是通过改变入射角或几何操纵而形成的。相反，在这项工作中，我们证明了由入射Terahertz波的不同线性极化状态引起的FW BIC的形成。此外，正如理论上所预测的那样，FW BIC区域的位置被验证为不对称性的变化。这允许独特的参数，入射极化，以诱导FW BIC并以不对称程度调节超级腔共振。在FW BIC附近观察到的极化选择性准BIC具有潜在的应用，光谱滤波和高性能传感设备。
Bound states in the continuum (BICs) are widely studied for their ability to confine light, produce sharp resonances for sensing applications and serve as avenues for lasing action with topological characteristics. Recent experiments have demonstrated the existence of exotic modes which occur in off-$Γ$\ points not accessible by symmetry-protected BICs, Freidrich-Wintgen (FW) BICs. In previous works, FW BICs were formed by either varying the incident angle or through geometric manipulation. On the contrary, in this work we demonstrate the formation of FW BICs induced by different linear polarization states of incident terahertz waves. Furthermore, as predicted by theory, the position of the FW BIC region is verified to change as a function of asymmetry. This allows for a unique parameter, incident polarization, to induce the FW BIC and modulate the supercavity resonance with the degree of asymmetry. The polarization-selective quasi-BICs observed near the FW BIC have potential applications in lasing, spectral filtering and high-performance sensing devices.
