Spin-decoupled excitation and wavefront shaping of structured surface waves <i>via</i> on-chip terahertz metasurfaces

Chong, Ming-Zhe; He, Yidan; Zhao, Junqiao; Zhang, Yueyi; Zhang, Zong-Kun; Zhang, Chong-Qi; Du, Chao‐Hai; Zang, Xiaofei; Liu, Pu‐Kun

doi:10.1039/d2nr06983k

Cited by 5 publications

(1 citation statement)

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“…However, researchers have primarily focused on constructing well-designed metasurfaces to achieve complex manipulation of SWs wavefronts rather than sensitive sensing. [31,32,[53][54][55] The long-range propagation capability of SWs has been overlooked, leading to the underutilization of the excellent sensing potential that SWs offer. Therefore, we expect to deeply delve the potential of SWs in the bio-sensing field.…”

Section: Introductionmentioning

confidence: 99%

Advanced Terahertz Refractive Sensing And Fingerprint Recognition Through Metasurface‐Excited Surface Waves

Zhang,

Wang,

Zhang

et al. 2024

Advanced Materials

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High‐sensitive metasurface‐based sensors are essential for effective substance detection and insightful bio‐interaction studies, which compress light in subwavelength volumes to enhance light‐matter interactions. However, current methods to improve sensing performance always focus on optimizing near‐field response of individual meta‐atom, and fingerprint recognition for bio‐substances necessitates several pixelated metasurfaces to establish a quasi‐continuous spectrum. Here, a novel sensing strategy is proposed to achieve Terahertz (THz) refractive sensing, and fingerprint recognition based on surface waves (SWs). Leveraging the long‐range transmission, strong confinement, and interface sensitivity of SWs, a metasurface‐supporting SWs excitation and propagation is experimentally verified to achieve sensing integrations. Through wide‐band information collection of SWs, the proposed sensor not only facilitates refractive sensing up to 215.5°/RIU, but also enables the simultaneous resolution of multiple fingerprint information within a continuous spectrum. By covering 5 μm thickness of polyimide, quartz and silicon nitride layers, the maximum phase change of 91.1°, 101.8° and 126.4° is experimentally obtained within THz band, respectively. Thus, our strategy broadens the research scope of metasurface‐excited SWs and introduces a novel paradigm for ultrasensitive sensing functions.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Advanced Terahertz Refractive Sensing And Fingerprint Recognition Through Metasurface‐Excited Surface Waves

Zhang,

Wang,

Zhang

et al. 2024

Advanced Materials

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Tunable VO2 metasurface for reflective terahertz linear and circular polarization wavefront manipulation at two frequencies independently

He,

Cai,

et al. 2024

Physica B: Condensed Matter

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Polarization multiplexed multifunctional metasurface for generating longitudinally evolving vector vortex beams

Zang,

Zhou,

Yang

et al. 2024

Physics Letters A

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Spin-decoupled excitation and wavefront shaping of structured surface waves via on-chip terahertz metasurfaces

Abstract: Surface waves (SWs) are of great importance in terahertz (THz) photonics applications, due to their subwavelength properties. Hence, it is crucial to develop surface wavefronts shaping techniques, which is urgent...

Cited by 5 publications

References 50 publications

Advanced Terahertz Refractive Sensing And Fingerprint Recognition Through Metasurface‐Excited Surface Waves

Advanced Terahertz Refractive Sensing And Fingerprint Recognition Through Metasurface‐Excited Surface Waves

Tunable VO2 metasurface for reflective terahertz linear and circular polarization wavefront manipulation at two frequencies independently

Polarization multiplexed multifunctional metasurface for generating longitudinally evolving vector vortex beams

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