Next Article in Journal
A High Manganese-Tolerant Pseudomonas sp. Strain Isolated from Metallurgical Waste Heap Can Be a Tool for Enhancing Manganese Removal from Contaminated Soil
Previous Article in Journal
Towards the Discovery of Influencers to Follow in Micro-Blogs (Twitter) by Detecting Topics in Posted Messages (Tweets)
Open AccessArticle

High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain

by Ziheng Zhang 1,2,3, Tong Li 4, Xiaofei Jiao 1,2,3, Guofeng Song 1,2,3,* and Yun Xu 1,2,3
1
Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2
College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
3
Beijing Key Laboratory of Inorganic Stretchable and Flexible Information Technology, Beijing 100083, China
4
School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410004, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(16), 5716; https://doi.org/10.3390/app10165716
Received: 30 July 2020 / Revised: 12 August 2020 / Accepted: 17 August 2020 / Published: 18 August 2020
(This article belongs to the Special Issue New Materials for Nanophotonics)
The optical vortex (OV) has drawn considerable attention owing to its tremendous advanced applications, such as optical communication, quantum entanglement, and on-chip detectors. However, traditional OV generators suffer from a bulky configuration and limited performance, especially in the ultraviolet range. In this paper, we utilize a large bandgap dielectric material, niobium pentoxide (Nb2O5), to construct ultra-thin and compact transmission-type metasurfaces to generate and detect the OV at a wavelength of 355 nm. The meta-atom, which operates as a miniature half-wave plate and demonstrates a large tolerance to fabrication error, manipulates the phase of an incident right-handed circular polarized wave with high cross-polarized conversion efficiency (around 86.9%). The phase delay of π between the orthogonal electric field component is attributed to the anti-parallel magnetic dipoles induced in the nanobar. Besides, focused vortex generation (topological charge l from 1 to 3) and multichannel detection (l from −2 to 2) are demonstrated with high efficiency, up to 79.2%. We envision that our devices of high flexibility may have potential applications in high-performance micron-scale integrated ultraviolet nanophotonics and meta-optics. View Full-Text
Keywords: dielectric metasurface; polarization conversion; optical vortex; niobium pentoxide dielectric metasurface; polarization conversion; optical vortex; niobium pentoxide
Show Figures

Figure 1

MDPI and ACS Style

Zhang, Z.; Li, T.; Jiao, X.; Song, G.; Xu, Y. High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain. Appl. Sci. 2020, 10, 5716.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop