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PT-axisymmetry for extraordinary field confinement

机译:PT轴对称性可实现非凡的磁场限制

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Optical Parity-Time (PT-) symmetric systems support unusual properties when the symmetric coupling between internal modes is broken. We propose a new class of quasiperiodic PT-axisymmetric systems which lead to a simultaneous extraordinary field enhancement and localization at the symmetry center. The effect is based on the asymmetric radial coupling of outward to inward propagating waves of the complex structure. We explore such optical potentials in ID and 2D combining gain/loss and index modulations, which could have actual realizations in nanophotonic structures. As a direct application, we show how to render a broad aperture vertical-cavity surface-emitting lasers (VCSEL) into a bright and narrow beam source.
机译:当内部模式之间的对称耦合断开时,光学奇偶时间(PT-)对称系统支持异常特性。我们提出了一种新的拟周期PT轴对称系统,该系统导致对称中心同时发生非同寻常的场增强和定位。该效果基于复杂结构的向外传播的波和向内部传播的波的不对称径向耦合。我们探索了结合增益/损耗和折射率调制的ID和2D光学势,它们在纳米光子结构中可能有实际的实现。作为直接的应用,我们展示了如何将宽孔径垂直腔面发射激光器(VCSEL)变成明亮和狭窄的光束源。

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