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

. 2016 Aug 12;5(8):e16133. doi: 10.1038/lsa.2016.133

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

Copyright © 2016 CIOMP.

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

PMC Copyright notice

Optical vortex generating spiral waveplates. Smaller (a, b) and larger (c) cross-sections optical vortex generators. (a, b) SEM images of micro-plates made by point-by-point exposure (inset in b shows 3D construction of irradiation matrix). (c) Height scans at four locations of the step edge of the spiral plate; diameter of the plate was 60 μm. Reproduced with permission from Ref. 59. Copyright (2010), AIP Publishing LLC.