Tunable Broadband Wavefronts Shaping via Chaotic Speckle Image Holography Carrier Fringes

Abstract

The advent of holography metasurfaces unlocks a plethora of exciting opportunities for rapid progress at the frontiers of various branches of science and engineering. However, the holography metasurfaces are constrained by sophisticated design and fabrication procedures and are less compatible with dynamic functionalities as well as unequal across the electromagnetic spectrum. Here, a new approach is proposed to fabricate speckle image holography metasurfaces with chaotic carrier fringes for broadband photon management. Using this holography metasurfaces structure allows to sculpt wavefronts of light almost at will. As a proof‐of‐concept, the incorporation of these structures into white organic light‐emitting diodes realizes tunable regional concentrated radiation patterns without spectral distortion. Moreover, the fabricated optical diffusers with the proposed structures also exhibit controllable broadband light softening, resulting in drastically enhanced extra optical gain than that of conventional diffusers. It is hoped that the effort can provide an alternative pathway for precisely broadband beam sculpting and can enable the integration of various optoelectronic systems for practical application.