Journal
PHOTONICS RESEARCH
Volume 10, Issue 9, Pages 2008-2014Publisher
CHINESE LASER PRESS
DOI: 10.1364/PRJ.453496
Keywords
-
Categories
Funding
- National Key Research and Development Program of China [2021YFB1401000, 2018YFB1801503]
- National Natural Science Foundation of China [62101111, 61931006, U20A20212, 61901093, 61871419, 61771327, 61921002]
- Sichuan Science and Technology Program [2020JDRC0028]
- China Postdoctoral Science Foundation [2020M683285]
Ask authors/readers for more resources
This work demonstrates a functionally decoupled terahertz metasurface that can incorporate any two functions into one metasurface and switch dynamically through external excitation. The metasurface operates in two modes with independent phase modulation, allowing for dynamic switching between dual functions.
Metasurfaces have powerful light field manipulation capabilities and have been researched and developed extensively in various fields. With an increasing demand for diverse functionalities, terahertz (THz) metasurfaces are also expanding their domain. In particular, integrating different functionalities into a single device is a compelling domain in metasurfaces. In this work, we demonstrate a functionally decoupled THz metasurface that can incorporate any two functions into one metasurface and switch dynamically through external excitation. This proposed metasurface is formed by the combination of split-ring resonators and phase change material vanadium dioxide (VO2). It operates in the single-ring resonant mode and double-ring resonant mode with varying VO2 in insulating and metallic states, respectively. More importantly, the phase modulation is independent in two operating modes, and both cover a 360 degrees cross-polarized phase with efficient polarization conversion. This characteristic makes it obtain arbitrary independent phase information on the metasurface with different modes to switch dual functions dynamically. Here, we experimentally demonstrate the functions of a tunable focal length and large-angle focus deflection of a THz off-axis parabolic mirror to verify the dual-function switching characteristics of the functionally decoupled metasurface. The functionally decoupled metasurface developed in this work broadens the way for the research and application of multifunctional modulation devices in the THz band. (c) 2022 Chinese Laser Press
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available