Fano-Like Resonance of Heat-Reconfigurable Silicon Grating Metasurface Tuned by Laser-Induced Graphene

Ma, Yukuan; Huang, Yulei; Zhu, Yuehong; Hao, Zhou; Yan, Congliao; Wang, Shutong; Deng, Guoliang; Zhou, Shouhuan

doi:10.3390/nano13030492

Nanomaterials

2023

DOI: 10.3390/nano13030492

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Fano-Like Resonance of Heat-Reconfigurable Silicon Grating Metasurface Tuned by Laser-Induced Graphene

Yukuan Ma

Yulei Huang

Yuehong Zhu

et al.

Abstract: We propose a heat-reconfigurable metasurface composed of the silicon-based gold grating. The asymmetric Fano-like line shape is formed due to the mutual coupling of the local surface plasmon (LSP) in the gap between the two layers of Au gratings and the surface propagating plasmon (SPP) on the surface of the Au gratings. Then, we effectively regulate the Fano resonance by applying a bias voltage to laser-induced graphene (LIG), to generate Joule heat, so that the resonant dip of one mode of the Fano resonance … Show more

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Cited by 2 publications

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Dynamically tunable Fano resonator with high sensitivity in the terahertz band

Zhang,

Zhong,

Cheng

et al. 2024

Appl. Opt.

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A dynamically tunable Fano resonator device with integrated graphene has been designed. It is capable of addressing the fixed performance of conventional sensors based on metal-insulator-metal (MIM) waveguides. The resonant frequency of the Fano resonance can be dynamically tuned over a wide range of frequency by regulating the bias voltage of the graphene for flexible tuning and optimized system performance, while maintaining a very high figure of merit (FOM). These indicate that the design has a number of advantages, including ease of fabrication, dynamic tunability, high sensitivity, and wide wavelength range.

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Dynamically tunable Fano resonator with high sensitivity in the terahertz band

Zhang,

Zhong,

Cheng

et al. 2024

Appl. Opt.

View full text Add to dashboard Cite

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Near-field control of gold nanostructure under joint action of surface plasmon polariton and incident light

Wang,

Sun

et al. 2023

Acta Phys. Sin.

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Localized Surface Plasmon (LSP) in nanostructure excited by Surface Plasmon Polariton (SPP) corresponds to stronger near-field enhancement and special spectral and dynamic responses that provides a new path to explore the interaction between light and matter. Meanwhile, this scheme can also release the signal background noise and structural thermal effect, and improve the performance of plasmonic components and sensing detectors based on LSP. However, the current research on this aspect is still insufficient. In this paper, we investigated the near-field characteristics of a plasmon composite structure composed of plasmon focusing lens and gold nanorod under the excitation of dual-beam using Finite-Difference Time-Domain (FDTD) method. The result shows that the near-field intensity control on the upper surface and in the gap position of the nanorod can be achieved by adjusting the relative time delay between the first light beam (used to excite SPP) and the second light beam (used to excite LSP). Specifically, the maximum adjustment range of the near-field intensity corresponding to 770 nm resonant mode in the gap position is about 23, and the adjustment period is about 2.4 fs. In a resonant mode dominated by SPP at a wavelength of 999 nm, the near-field intensity adjustment range is as small as 6, and the adjustment period is about 4 fs. On the upper surface of the structure, the adjustment range of the near-field intensity of the two resonant modes (719 nm and 802 nm) is basically the same (about 15), and the adjustment period is 2.4 fs and 2.8 fs. The achievement of the near field control is attributed to the coherent superposition of SPP-excited LSP with light-excited LSP. In addition, the dephasing time of the coupling field was investigated using quasi- normal mode. It is found that the nanorod structure will correspond to different dephasing time under different relative time delay between two excitation light beams. Specifically, for the time delay of 0.72 fs (Δt=0.72 fs), the corresponding dephasing time for both modes is the same of 6.0 fs. For Δt=1.92 fs, the dephasing time of the longer-wavelength mode is 7.1 fs, and the one of the shorter-wavelength mode is 5.8 fs. We attribute the variation of the dephasing time to different coupling strength between the two modes at different delay times. This study may further promote the application of plasmons in the fields of surface-enhanced Raman scattering and plasmon assisted catalysis.

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Fano-Like Resonance of Heat-Reconfigurable Silicon Grating Metasurface Tuned by Laser-Induced Graphene

Cited by 2 publications

References 24 publications

Dynamically tunable Fano resonator with high sensitivity in the terahertz band

Dynamically tunable Fano resonator with high sensitivity in the terahertz band

Near-field control of gold nanostructure under joint action of surface plasmon polariton and incident light

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