Direct generation of radially polarized vector vortex beam with an exciton-polariton laser
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Vector vortex beams are a class of optical beams with singularities in their space-variant polarization. Vector vortex beam lasers have applications in many areas including imaging and communication, where vertical-cavity lasers emitting Gaussian beams have been most widely used so far. Generation of vector vortex beams from vertical-cavity lasers has required external control or modulation. Here, by utilizing a polarization-selective subwavelength grating as one of the reflectors in a vertical semiconductor microcavity, we design the spin textures of the polariton mode and demonstrate polariton lasing in a single-mode, radially polarized vector vortex beam. Polarization and phase distributions of the emission are characterized by polarization-resolved imaging and interferometry. This method of vector vortex laser beam generation allows low threshold power, stable single-mode operation, scalability, and on-chip integration, all of which are important for applications in imaging and communication.
Hu , J , Kim , S , Schneider , C , Höfling , S & Deng , H 2020 , ' Direct generation of radially polarized vector vortex beam with an exciton-polariton laser ' , Physical Review Applied , vol. 14 , no. 4 , 044001 . https://doi.org/10.1103/PhysRevApplied.14.044001
Physical Review Applied
Copyright © 2020 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevApplied.14.044001.
DescriptionFunding: J.H., S.K. and H.D. acknowledge financial support from the US Air Force Office of Scientific Research under grant FA9550-15-1-0240 and the US National Science Foundation (NSF) under grant DMR 1150593. The Würzburg group gratefully acknowledges support by the state of Bavaria.
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