Multi-foci metalens for spin and orbital angular momentum interaction

Shengtao Mei; M. Q. Mehmood; Kun Huang; Cheng-Wei Qiu

doi:10.1117/12.2187375

1 September 2015 Multi-foci metalens for spin and orbital angular momentum interaction

Shengtao Mei, M. Q. Mehmood, Kun Huang, Cheng-Wei Qiu

Proceedings Volume 9544, Metamaterials, Metadevices, and Metasystems 2015; 95441J (2015) https://doi.org/10.1117/12.2187375
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

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.

Conference Presentation

Citation Download Citation

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 (1 September 2015); https://doi.org/10.1117/12.2187375

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