Generation of vector beams of Bell-like states by manipulating vector vortex modes with plasmonic metasurfaces

• DOI: 10.1364/ol.415981
• Publication Date: 2020-12-21T05:30:11Z
• Authors: Xiang-Yu Zeng; Yu-Qin Zhang; Rui-Rui Zhang; Xiao-Rong Ren; Zi-Jun Zhan; Man-Na Gu; Rui Sun; Chun-Xiang Liu; Chuan-Fu Cheng
• Keywords: Optical vortex

Metasurfaces with orthogonal nano-slit pairs arranged on spirals are proposed to generate vector beams (VBs) of Bell-like states and slanted polarizations. The design the metasurfaces is based theoretically derived parameter condition for manipulation two vortex modes, which satisfied by matching three parameters rotation order <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>m</mml:mi> </mml:math> , spiral <mml:mi>n</mml:mi> incident polarization helicity <mml:mi>σ</mml:mi> . linear VBs controlled initial orientation angle <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi>φ</mml:mi> <mml:mn>0</mml:mn> </mml:msub> </mml:mrow> slit pairs. satisfying quality experimentally obtained, analytical simulated results validated.