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Soft Matter Metasurface for Sub-Terahertz Near-Field Manipulations and Wireless Communications
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DOI：10.1002/lpor.202502123.png)
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Abstract
En 中文
Sub-terahertz (THz) wireless technology is recognized for its potential to deliver terabits per second throughput and ultralow latency, reaching the sub-microsecond level. Its extensive spectral resources enable faster and more reliable data transmissions, ultrahigh throughput short-range communication, and innovative applications, including environmental sensing. Liquid crystal is a kind of soft material with controllable self-assembled structures under external stimuli, offering opportunities for programmable and cost-effective controls of sub-THz waves. Unlike the traditional transmissive metasurfaces integrated with soft material that are constrained in control dimensions and diversity, here we propose an addressable transmissive soft matter metasurface with 24 × 24 units and low-voltage driven (≤3.6 V). The experimental results show that the proposed meta-atom achieves an amplitude modulation depth (MD) of 18.6 dB and a phase tuning range of approximately 181° at 91.7 and 97.4 GHz, respectively. The fabricated single prototype enables various near-field wavefront engineering applications, such as amplitude-only modulation imaging, phase-only dynamic holography, and arbitrary-direction non-diffractive beam generation. Based on the prototype, we further develop a wireless communication system using the non-diffractive beams, achieving low error vector magnitude in information transmission. The proposed metasurface opens a new pathway for near-field wavefront management and signal enhancement in digital holography and sixth-generation (6G) wireless communications.
Keywords:
near-field
soft matter
sub-terahertz
wavefront engineering
wireless communications
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