The development of metasurface, capable of controlling wave-fronts through interfacial phase discontinuity, offers a fascinating methodology for designing two dimensional miniaturized optical devices. Owing to an additional advantage of the enhanced useful transmission via Bainet-inverted matasurface, we exploit them to demonstrate an intriguing concept of merging the phase-profiles of two distinct optical devices, a lens and a spiral phase plate, to realize an ultrathin nanostructured optical vortex lens. The proposed device can has multiple focal planes along the longitudinal direction; whereas the number of focal plans, corresponding topological charges and focal lengths can readily be tailored to meet any desired requirements. Meanwhile, the dual-polarity feature of the optical vertex metalens exhibits spin controlled real and virtual focal plans, while dispersionless aptitude of nanobars enables its working over the broadband. The concept unveils a novel way of employing metasurface, to engraft the phase profiles of multiple bulk devices, to achieve unique functionalities for promising applications in integrated photonics.
Shengtao Mei, M. Q. Mehmood, Kun Huang, and Cheng-Wei Qiu, "Multi-foci metalens for spin and orbital angular momentum interaction," Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 95441J (Presented at SPIE Nanoscience + Engineering: August 12, 2015; Published: 1 September 2015); https://doi.org/10.1117/12.2187375.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 16,000 conference presentations, including many plenary and keynote presentations.