Funding for this research was provided by:
National Natural Science Foundation of China (NSFC) (61528401)
National Natural Science Foundation of China (NSFC) (61775028)
National Natural Science Foundation of China (NSFC) (81571722)
Department of Science and Technology of Sichuan Province (2016HH0019)
University of Electronic Science and Technology of China (UESTC) (A03012023601011)
This article is maintained by: OSA - The Optical Society
Crossref DOI link to publisher maintained version: https://doi.org/10.1364/OL.42.004434
Article type: letter
Similarity check: Screened by Similarity Check
Peer review
Peer reviewed: Yes
Review process: Single blind
Publication History
Received: 28 August 2017
Accepted: 2 October 2017
Published: 25 October 2017
Copyright: © 2017 Optical Society of America