Higher-order laser mode converters with dielectric metasurfaces

• DOI: 10.1364/ol.40.005506
• Publication Date: 2015-11-18T20:09:34Z
• Authors: Yongli He; Zhenxing Liu; Yachao Liu; Junxiao Zhou; Yougang Ke; Hailu Luo; Shuangchun Wen
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

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.