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Fu, Pan; Ni, Pei‐Nan; Wu, Bo; Pei, Xian‐Zhi; Wang, Qiu‐Hua; Chen, Pei‐Pei; Xu, Chen; Kan, Qiang; Chu, Wei‐Guo; Xie, Yi‐Yang
Advanced materials (Weinheim), 03/2023, Volume: 35, Issue: 12Journal Article
Metasurface polarization optics that consist of 2D array of birefringent nano‐antennas have proven remarkable capabilities to generate and manipulate vectorial fields with subwavelength resolution and high efficiency. Integrating this new type of metasurface with the standard vertical cavity surface‐emitting laser (VCSEL) platform enables an ultracompact and powerful solution to control both phase and polarization properties of the laser on a chip, which allows to structure a VCSEL into vector beams with on‐demand wavefronts. Here, this concept is demonstrated by directly generating versatile vector beams from commercially available VCSELs through on‐chip integration of high‐index dielectric metasurfaces. Experimentally, the versatility of the approach for the development of vectorial VCSELs are validated by implementing a variety of functionalities, including directional emission of multibeam with specified polarizations, vectorial holographic display, and vector vortex beams generations. Notably, the proposed vectorial VCSELs integrated with a single layer of beam shaping metasurface bypass the requirements of multiple cascaded optical components, and thus have the potential to promote the advancements of ultracompact, lightweight, and scalable vector beams sources, enriching and expanding the applications of VCSELs in optical communications, laser manipulation and processing, information encryption, and quantum optics. On‐chip generation and manipulation of vector beams are demonstrated by monolithically integrating vectorial metasurfaces with standard vertical cavity surface‐emitting lasers (VCSELs). The developed approach enables a powerful tool to structure the complex wavefronts of a VCSEL in an ultracompact way, providing the access to previously unattainable both phase and polarization degrees of freedom.
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