论文标题
与非对称非热结构中连续体中的quasibound状态相关的CPA占用
CPA-lasing associated with the quasibound states in the continuum in asymmetric non-Hermitian structures
论文作者
论文摘要
非热的光子系统具有损失和增益，吸引了很多关注，因为它们在塑造光流方面具有出色的能力。将不对称性引入$ \ Mathcal {pt} $ - 具有完美平衡的损失和增益的对称系统，我们揭示了从连续体（Quasi-bic）中的Quasibound状态过渡到同时相干的完美吸收（CPA），并在层次结构中均匀结构（CPA），并在层次结构中编写Epsilon-Near-Near-n-Near-nez-nz-nz-nz-nz-nz-nz-nzery（Enz）。用散射矩阵技术分析了两种类型的不对称性（几何和非热者）。与准BIC相关的CPA-LASIN的影响的特征是质量因子对不对称参数的反比的异常线性依赖性。此外，在非甲米不对称性下的CPA射击点上发现了反直觉诱导的类似诱发的行为。非热结构的报告的特征是传感和激光应用的视角。
Non-Hermitian photonic systems with loss and gain attract much attention due to their exceptional abilities in molding the flow of light. Introducing asymmetry to the $\mathcal{PT}$-symmetric system with perfectly balanced loss and gain, we reveal the mechanism of transition from the quasibound state in the continuum (quasi-BIC) to the simultaneous coherent perfect absorption (CPA) and lasing in a layered structure comprising epsilon-near-zero (ENZ) media. Two types of asymmetry (geometric and non-Hermitian) are analyzed with the scattering matrix technique. The effect of the CPA-lasing associated with the quasi-BIC is characterized with the unusual linear dependence of the quality factor on the inverse of asymmetry parameter. Moreover, the counter-intuitive loss-induced-lasing-like behavior is found at the CPA-lasing point under the non-Hermitian asymmetry. The reported features of non-Hermitian structures are perspective for sensing and lasing applications.
