Abstract
A simple and compact converter based on the dielectric metasurface is proposed for the transformation of Gaussian mode to Hermite–Gaussian and Laguerre–Gaussian modes. We establish the relationship between the phase of a desired mode and the local orientation of the optical axis based on the evolution of Pancharatnam–Berry phase on Poincaré sphere. By controlling the local orientation of the optical axis in the dielectric metasurface, we can achieve any desired higher-order laser mode.
© 2015 Optical Society of America
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