论文标题
在反对称光学系统中实现连续体中结合状态的实现
Realization of bound states in the continuum in anti-PT-symmetric optical systems
论文作者
论文摘要
源自量子力学的新型物理概念，例如非甲米系统（主要涉及PT和Antip PTS对称性）和连续体（BICS）的界面状态，对光学和光子学界引起了极大的兴趣。迄今为止，BICS和Ant-PT对称性似乎是两个独立的主题。在这里，我们首次提出了一个平行的级联回应系统，以同时实现BICS和反对对称性。我们发现，当任何两个相邻的谐振器之间的相移是π的整数倍数时，对Fabry-PérotBIC和Ant-PT对称性的要求都可以满足。我们进一步分析了由不同数量的谐振器组成的级联谐振器系统，并证明了它们对制造缺陷的稳健性。所提出的结构可以在集成的光子平台上很容易实现，该平台可以具有许多从BIC和反PT对称性的优势中受益的应用，例如Ultralow-LineWidth Lasing激光，增强的光学传感和光学信号处理。
Novel physical concepts that originate from quantum mechanics, such as non-Hermitian systems (dealing mostly with PT and anti-PT symmetry) and bound states in the continuum (BICs), have attracted great interest in the optics and photonics community. To date, BICs and anti-PT symmetry seem to be two independent topics. Here, we for the first time propose a parallel cascaded-resonator system to achieve BICs and anti-PT symmetry simultaneously. We found that the requirements for the Fabry-Pérot BIC and anti-PT symmetry can both be satisfied when the phase shift between any two adjacent resonators is an integer multiple of π. We further analyzed the cascaded-resonator systems which consist of different numbers of resonators and demonstrated their robustness to fabrication imperfections. The proposed structure can readily be realized on an integrated photonic platform, which can have many applications that benefit from the advantages of both BICs and anti-PT symmetry, such as ultralow-linewidth lasing, enhanced optical sensing, and optical signal processing.
