Boulliard Guillaume, Roland Iännis, Schanne Domitille, Petolat Marie, Filloux Pascal, Lhuillier Emmanuel, Degiron Aloyse
Université Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, Paris, France.
Sorbonne Université, CNRS, Institut des NanoSciences de Paris, Paris, France.
Nat Commun. 2025 May 29;16(1):4974. doi: 10.1038/s41467-025-60336-w.
The past few years have witnessed impressive developments in optical sources capable of emitting structured forms of light, such as optical vortices or vector beams. Because structured beams result from carefully engineered interferences, their synthesis requires coherent light and all the sources demonstrated so far rely on coherent lasing cavities-usually pumped with external optical schemes. Here, we introduce non-lasing sources emitting directional vortex beams upon electrical injection. Their architecture consists of colloidal PbS quantum dot LEDs that integrate a photonic environment with two complementary functions: to make the emitters populate radial photonic modes with extended spatial coherence, and to structure the leakage of these modes into free space. Our electrically-pumped sources exhibit phase singularities across the electroluminescence spectrum of the quantum dots, leading to vortex light emission with a bandwidth of 300 nm in the near-infrared.
在过去几年中,能够发射结构化光形式(如光学涡旋或矢量光束)的光源取得了令人瞩目的进展。由于结构化光束是由精心设计的干涉产生的,它们的合成需要相干光,并且迄今为止展示的所有光源都依赖于相干激光腔——通常由外部光学方案泵浦。在这里,我们介绍了通过电注入发射定向涡旋光束的非激光光源。它们的结构由胶体硫化铅量子点发光二极管组成,该二极管集成了具有两种互补功能的光子环境:使发射器填充具有扩展空间相干性的径向光子模式,并将这些模式的泄漏结构化到自由空间中。我们的电泵浦光源在量子点的电致发光光谱中表现出相位奇点,导致在近红外波段具有300纳米带宽的涡旋光发射。