Variable vortex optical metasurface: synergistic control of topological charge and focal position

Key Points

• The study aims to explore the control of topological charge and focal position of vortex beams using an optical metasurface.
• Developed a variable vortex optical metasurface design.
• Investigated the interaction of orbital angular momentum with the metasurface.
• Analyzed the effects on beam manipulation through experimental setups.
• Achieved tailored control over the focal position.
• Successfully modified the topological charge of the vortex beam.
• Demonstrated significant improvements in beam manipulation effectiveness.