Flat Helical Nanosieves

Flat Helical Nanosieves

Advanced Functional Materials

10.1002/adfm.201601345

https://doi.org/10.1002/adfm.201601345

Shengtao Mei, Muhammad Qasim Mehmood Mehmood, Sajid Hussain, Kun Huang, Xiaohui Ling, Shawn Yohanes Siew, Hong Liu, Jinghua Teng, Aaron Danner, Cheng-Wei Qiu

24 May 2016

Mei, S., Mehmood, M.Q., Hussain, S., Huang, K., Ling, X., Siew, S.Y., Liu, H., Teng, J., Danner, A. and Qiu, C.‐W. (2016), Flat Helical Nanosieves. Adv. Funct. Mater., 26: 5255-5262. doi:10.1002/adfm.201601345

Compact and miniaturized devices with flexible functionalities are always highly demanded in optical integrated systems. Plasmonic nanosieve has been successfully harnessed as an ultrathin flat platform for complex manipulation of light, including holography, vortex generation, and nonlinear processes. Compared with most of the reported single‐functional devices, multifunctional nanosieves might find more complex and novel applications across nanophotonics, optics, and nanotechnology. Here, a promising roadmap for nanosieve‐based helical devices is experimentally demonstrated, which achieves full manipulations of optical vortices, including its generation, hybridization, spatial multiplexing, focusing and nondiffraction propagation, etc., by controlling the geometric phase of spin light via over 121 thousands of spatially rotated nanosieves. Thanks to such spin‐conversion nanosieve helical elements, it is no longer necessary to employ the conventional two‐beam interferometric measurement to characterize optical vortices, while the interference can be realized natively without changing any parts of the current setup. The proposed strategy makes the far‐field manipulations of optical orbital angular momentum within an ultrathin interface viable and bridges singular optics and integrated optics. In addition, it enables more unique extensibility and flexibility in versatile optical elements than traditional phase‐accumulated helical optical devices.

PublisherCopyrights

This is the pre-peer reviewed version of the following article: Mei, S., Mehmood, M.Q., Hussain, S., Huang, K., Ling, X., Siew, S.Y., Liu, H., Teng, J., Danner, A. and Qiu, C.‐W. (2016), Flat Helical Nanosieves. Adv. Funct. Mater., 26: 5255-5262. doi:10.1002/adfm.201601345, which has been published in final form at https://doi.org/10.1002/adfm.201601345. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

https://oar.a-star.edu.sg/communities-collections/articles/14595

1616-301X
1616-3028

Institute of Materials Research and Engineering