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- W4288087403 abstract "In this paper, for the first time, a new generation of ultrafast reprogrammable multi-mission bias encoded metasurface is proposed for dynamic THz wavefront engineering by employing VO2 reversible and fast monoclinic to tetragonal phase transition. The multi-functionality of our designed VO2 based coding metasurface (VBCM) was guaranteed by elaborately designed meta-atom comprising three-patterned VO2 thin films whose operational statuses can be dynamically tuned among four states of 00- 11 by merely changing the biasing voltage controlled by an external FPGA platform. Capitalizing on such meta-atom design and by driving VBCM with different spiral-like and spiral-parabola-like coding sequences, single vortex beam and focused vortex beam with interchangeable OAM modes were satisfactorily generated respectively. Additionally, by adopting superposition theorem and convolution operation, symmetric/asymmetric multiple beams and arbitrarily-oriented multiple vortex beams in pre-demined directions with different topological charges are realized. The versatility of our designed VBCM also has equipped a platform to focus the incident THz wavefront into a pre-determined point which can be dynamically altered. Several illustrative examples successfully have clarified that proposed VBCM is a promising candidate for solving crucial THz challenges such as high data rate wireless communication where ultrafast switching between several missions is required." @default.
- W4288087403 created "2022-07-28" @default.
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- W4288087403 date "2019-10-31" @default.
- W4288087403 modified "2023-09-29" @default.
- W4288087403 title "Ultrafast reprogrammable multifunctional vanadium-dioxide-assisted metasurface for dynamic THz wavefront engineering" @default.
- W4288087403 doi "https://doi.org/10.48550/arxiv.1910.14272" @default.
- W4288087403 hasPublicationYear "2019" @default.
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