The bound state in the continuum in flexible terahertz metasurfaces enabled sensitive biosensing

Qiu, Dong; Sun, Shuhui; Cheng, Xiao‐Ning; Jin, Xiaoyu; Qiao, You Lin; Zhang, Wei; Yang, Di; Chen, Xianzhong; Li, Zeren; Li, Jia; Yao, Jianquan

doi:10.1039/d3cp02414h

Cited by 1 publication

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“…Incident waves with polarization that parallel to the metal grating are reflected, while the perpendicular polarization is transmitted. One of the biggest drivers for the research polarization control is the application of THz sensors [19][20][21][22][23][24]. For high-sensitivity sensing, the quality (Q) factor is crucial for metasurfaces-based sensors.…”

Section: Introductionmentioning

confidence: 99%

Polarization-insensitive quasi-bound states in the continuum supported by terahertz all-metallic complementary periodic cross-shaped resonators

Liu,

Zhang,

et al. 2024

Phys. Scr.

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A strategy to design polarization-insensitive quasi-bound states in the continuum (BICs) metasurfaces based on symmetry-broken metamolecules is introduced. Such metasurfaces consist of four complementary periodic cross-shaped resonators (CPCRs), forming a novel C4 structure through rotating arrangements, whose resonant qualities can be improved by optimizing the slit length. Unlike single CPCRs sensitive to polarization changes, experimental results demonstrate that the constructed metasurface exhibits the same spectral response when the polarization angle alters, despite a 2.4 GHz frequency variation found in these simulated resonances. This polarization-insensitive quasi-BIC show a frequency shift of 67.1 GHz when a 20 μm-thick polyimide membrane is attached. Modification of the structural parameters also has an impact on its sensing performance. The study provides a way to achieve high-quality resonances with polarization-insensitive properties that can be easily applied to high-sensitivity sensor design for THz sensing.

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Section: Introductionmentioning

confidence: 99%

Polarization-insensitive quasi-bound states in the continuum supported by terahertz all-metallic complementary periodic cross-shaped resonators

Liu,

Zhang,

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

The bound state in the continuum in flexible terahertz metasurfaces enabled sensitive biosensing

Abstract: The combination of flexible device and novel electromagnetic resonances offers new dimensions to manipulate electromagnetic waves and promises new device functionalities. In this study, we experimentally demonstrate a flexible metasurface...

Cited by 1 publication

References 32 publications

Polarization-insensitive quasi-bound states in the continuum supported by terahertz all-metallic complementary periodic cross-shaped resonators

Polarization-insensitive quasi-bound states in the continuum supported by terahertz all-metallic complementary periodic cross-shaped resonators

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