Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Sep 24;10:15677. doi: 10.1038/s41598-020-72668-2

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Schematic drawings of different unit cell structures, including their phase delays and transmission. (a) Square unit cell structure; (b) phase delay of square unit cell; (c) transmission of square unit cell; (d) hexagon unit cell structure; (e) phase delay of hexagon unit cell; (f) transmission of hexagon unit cell. The diameter of square unit cell is 50–240 nm and the diameter of hexagon unit cell is 50–220 nm. Both the heights are set to 600 nm and operation wavelength is 532 nm.