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On-chip generation of broadband high-order Laguerre–Gaussian modes in a metasurface

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Abstract

With experimental results, we demonstrate the generation of high-order Laguerre–Gaussian modes with non-zero radial indices using a metal meta-surface, which is composed of a series of rectangle nanoholes with different orientation angles. The phase shift after transmission through the metasurface is determined by the orientation angle of the nanohole. This device works over a broad wavelength band ranging from 700 to 1000 nm. Moreover, we achieve a LG mode with a radial mode index of 10. Our results provide an integrated method to obtain high-order LG modes, which can be used to enhance the capacity in optical communication and manipulation.

© 2017 Optical Society of America

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