Controlling circularly polarized (CP) emission is key for both fundamental understanding and applications in the field of chiral photonics and electronics. Here, a completely new way to achieve this goal is presented. A luminescent thin film, made from a chiral conjugated phenylene bis‐thiophenylpropynone able to self‐assemble into ordered structures, emits highly circularly polarized light with opposite handedness from its two opposite faces. Such emergent nonreciprocal behavior in CP emission, so far unprecedented, represents a fundamental advance, opening new opportunities in design, preparation, and applications of CP emitting materials.

中文翻译：

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有机薄膜出现的不可逆圆极化发射。

对于手性光子学和电子学领域的基本理解和应用，控制圆偏振（CP）发射至关重要。这里，提出了一种实现该目标的全新方法。由手性共轭亚苯基双-硫代苯基丙炔能够自组装成有序结构的发光薄膜，会从其两个相对的面以相反的手性发出高度圆偏振的光。迄今为止，这种前所未有的CP发射中不可逆的行为代表了一种根本的进步，为CP发射材料的设计，制备和应用开辟了新的机遇。