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Title: All-optical active THz metasurfaces for ultrafast polarization switching and dynamic beam splitting
Authors: Cong, Longqing
Srivastava, Yogesh Kumar
Zhang, Huifang
Zhang, Xueqian
Han, Jiaguang
Singh, Ranjan
Keywords: Dynamic Beam Splitting
Issue Date: 2018
Source: Cong, L., Srivastava, Y. K., Zhang, H., Zhang, X., Han, J., & Singh, R. (2018). All-optical active THz metasurfaces for ultrafast polarization switching and dynamic beam splitting. Light: Science & Applications, 7(1), 28-. doi:10.1038/s41377-018-0024-y
Series/Report no.: Light: Science & Applications
Abstract: Miniaturized ultrafast switchable optical components with an extremely compact size and a high-speed response will be the core of next-generation all-optical devices instead of traditional integrated circuits, which are approaching the bottleneck of Moore’s Law. Metasurfaces have emerged as fascinating subwavelength flat optical components and devices for light focusing and holography applications. However, these devices exhibit a severe limitation due to their natural passive response. Here we introduce an active hybrid metasurface integrated with patterned semiconductor inclusions for all-optical active control of terahertz waves. Ultrafast modulation of polarization states and the beam splitting ratio are experimentally demonstrated on a time scale of 667 ps. This scheme of hybrid metasurfaces could also be extended to the design of various free-space all-optical active devices, such as varifocal planar lenses, switchable vector beam generators, and components for holography in ultrafast imaging, display, and high-fidelity terahertz wireless communication systems.
ISSN: 2095-5545
DOI: 10.1038/s41377-018-0024-y
Rights: © 2018 The Author(s). 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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