论文标题
光子晶体中的非铁皮皮肤效应和吸收开放式模式的激光
Non-Hermitian skin effect and lasing of absorbing open-boundary modes in photonic crystals
论文作者
论文摘要
我们探索了非热光子系统中的吸收开放式模式。这些模式在无限系统大小的极限中具有连续频谱，并且可以表现出非铁皮皮肤效应。与固定端的开放式条件下的常规非炎性皮肤模式相反，相关模式表现出强大的尺寸依赖性频谱，逐渐收敛到非Bloch波段分散体。这些模式对应于$ S $矩阵的杆子，并且与激光密切相关。我们在具有点 - （伪）间隙拓扑的增益中证明了这些特性。
We explore absorbing open-boundary modes in non-Hermitian photonic systems. The modes have a continuum spectrum in the infinite system-size limit and can exhibit the non-Hermitian skin effect. In contrast to the conventional non-Hermitian skin modes under the fixed-end open-boundary condition, the modes concerned exhibit a strongly size-dependent spectrum that gradually converges to the non-Bloch-band dispersion. The modes correspond to the poles of the $S$ matrix, and are closely related to the lasing. We demonstrate these properties in a two-dimensional non-Hermitian photonic crystal with gain having a point-(pseudo)gap topology.
