Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film

Yue, Z, Ren, H, Wei, S, Lin, J and Gu, M 2018, 'Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film', Nature Communications, vol. 9, no. 1, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

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Title Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film
Author(s) Yue, Z
Ren, H
Wei, S
Lin, J
Gu, M
Year 2018
Journal name Nature Communications
Volume number 9
Issue number 1
Start page 1
End page 8
Total pages 8
Publisher Nature Publishing Group
Abstract Complementary metal-oxide-semiconductor (CMOS) technology has provided a highly sensitive detection platform for high-resolution optical imaging, sensing and metrology. Although the detection of optical beams carrying angular momentum have been explored with nanophotonic methods, the metrology of optical angular momentum has been limited to bulk optics. We demonstrate angular-momentum nanometrology through the spatial displacement engineering of plasmonic angular momentum modes in a CMOS-compatible plasmonic topological insulator material. The generation and propagation of surface plasmon polaritons on the surface of an ultrathin topological insulator Sb2Te3 film with a thickness of 100 nm is confirmed, exhibiting plasmonic figures of merit superior to noble metal plasmonics in the ultraviolet-visible frequency range. Angular-momentum nanometrology with a low crosstalk of less than -20 dB is achieved. This compact high-precision angular-momentum nanometrology opens an unprecedented opportunity for on-chip manipulation of optical angular momentum for high-capacity information processing, ultrasensitive molecular sensing, and ultracompact multi-functional optoelectronic devices.
Subject Materials Engineering not elsewhere classified
Nanotechnology not elsewhere classified
Optical Physics not elsewhere classified
DOI - identifier 10.1038/s41467-018-06952-1
Copyright notice © 2018. The Author(s). 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 license, and indicate if changes were made. To view a copy of this license, visit: http://creativecommons.org/licenses/by/4.0/
ISSN 2041-1723
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