论文标题
损失和增益的全dielectric替换材料中的被困模式激发
Trapped-mode excitation in all-dielectric metamaterials with loss and gain
论文作者
论文摘要
基于单个光学系统中损耗和增益培养基的联合损失和增益培养基的非热光子学提供了多种控制和生成光流的方法。在本文中，我们表明，通过损失和增益成分向系统中引入非热扰动，可以激发称为被困模式的高质量共振，而无需更改单位细胞几何形状的对称性。为了证明这一想法，我们考虑了一种广泛使用的全含量平面超材料，其晶胞由一对由序数（损失）和掺杂（带有增益）硅制成的矩形纳米annoantens组成。由于可以通过更改空间对称性和非热性来控制捕获模式共振的质量因素，因此变化的损失和增益使我们能够补偿不对称的影响并恢复局部模式的质量因素。获得的结果提出了新的方法来实现非铁质材料的高质量共振，这对许多实际应用纳米光子学有望。
Non-Hermitian photonics based on combining loss and gain media within a single optical system provides a number of approaches to control and generate the flow of light. In this paper, we show that by introducing non-Hermitian perturbation into the system with loss and gain constituents, the high-quality resonances known as trapped modes can be excited without the need to change the symmetry of the unit cell geometry. To demonstrate this idea, we consider a widely used all-dielectric planar metamaterial whose unit cell consists of a pair of rectangular nanoantennas made of ordinal (with loss) and doped (with gain) silicon. Since the quality factor of the trapped-mode resonance can be controlled by changing both spatial symmetry and non-Hermiticity, varying loss and gain allows us to compensate for the influence of asymmetry and restore the quality factor of the localized mode. The results obtained suggest new ways to achieve high-quality resonances in non-Hermitian metamaterials promising for many practical applications in nanophotonics.
