论文标题
观察来自对称性跨度的热辐射中的非变化光螺旋性
Observation of Non-Vanishing Optical Helicity in Thermal Radiation from Symmetry-Broken Metasurfaces
论文作者
论文摘要
旋转热辐射是在凝结的天文物体中观察到的独特现象，包括狼射线星EZ-CMA和红色脱位星G99-47，这是由于存在强磁场。在这里，通过设计对称性破裂的元信息，我们证明了即使在不使用磁场的情况下，也可以实现具有非呈现光学螺旋性的旋转热辐射。我们通过工程设计无散布的频带来设计非变化的光螺旋性，该带散发出全向旋转热辐射，我们的设计达到了基本限制的39％。我们的结果牢固地表明，跨膜可以在热波动激发的不一致的辐射中赋予自旋连贯性。基于对称性的设计策略还提供了一种一般途径，可以全面控制其时间和自旋连贯性的热辐射。
Spinning thermal radiation is a unique phenomenon observed in condensed astronomical objects including the Wolf-Rayet star EZ-CMa and the red degenerate star G99-47, due to existence of strong magnetic fields. Here, by designing symmetry-broken metasurfaces, we demonstrate that spinning thermal radiation with a non-vanishing optical helicity can be realized even without applying a magnetic field. We design non-vanishing optical helicity by engineering a dispersionless band which emits omnidirectional spinning thermal radiation, where our design reaches 39% of the fundamental limit. Our results firmly suggest metasurfaces can impart spin coherence in the incoherent radiation excited by thermal fluctuations. The symmetry-based design strategy also provides a general pathway for comprehensively controlling thermal radiation in its temporal and spin coherence.
