Metal Wire Grid Terahertz Polarizer Fabricated by Femtosecond Laser Micro-Machining

Yanqing, 陈燕青 Chen; Bingpan, 高炳攀 Gao; Yanzhang, 林炎章 Lin; Xuewei, 居学尉 Ju; Jie, 王杰 Wang; Xiangfeng, 王向峰 Wang

doi:10.3788/cjl201845.0802005

Cited by 4 publications

(2 citation statements)

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“…Single-layer FSSs with geometrical parameters l = 280 µm, w = 65 µm, t = 10 µm, and p = 350 µm were fabricated on 10 µm Al foils using a femtosecond laser micromachining system [13,31]. The femtosecond laser has a wavelength of 800 nm, a pulse width of 45 fs, and a repetition rate of 1 KHz.…”

Section: Theory and Experimentsmentioning

confidence: 99%

Resonant Coupling Effects in a Double-Layer THz Bandpass Filter

et al. 2020

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Cascading similar frequency selective surfaces (FSSs) improves the roll-off rate and frequency selectivity of THz bandpass filters. However, resonant coupling between FSS layers causes anomalous transmission peaks. In this work, we have employed an equivalent circuit model to analyze a double-layer FSS structure with periodic cross apertures at different interlayer spacing. We found that the anomalous peaks can be attributed to the resonant coupling between the upper and lower layer FSSs, and their periodic appearance with changing interlayer spacing is related to the half-wavelength repeatability of the circuit. We have fabricated a double-layer FSS sample using femtosecond laser micromachining and measured it using time-domain THz spectroscopy. The results using the equivalent circuit model agree with the Finite-Difference Time-Domain (FDTD) and experimental results.

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Section: Theory and Experimentsmentioning

confidence: 99%

Resonant Coupling Effects in a Double-Layer THz Bandpass Filter

et al. 2020

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“…Terahertz (THz) technology has made impressive progress in recent years, with a wide range of applications in spectroscopy, imaging, sensing, and communication [1][2][3]. This has partially benefited from the development of various THz functional devices, such as THz filters [4][5], modulators [6], polarizers [7], isolators [8], and sensors [9], etc. These devices are mostly based on a variety of functional materials including: liquid crystals [10][11], semiconductors [12], graphene [13], carbon nanotubes [14], etc.…”

Section: Introductionmentioning

confidence: 99%

Large Terahertz Birefringence in Nanocomposite Films Made From Magnetorheological Fluid

Chen,

Zhu,

Huang

et al. 2024

IEEE Trans. Plasma Sci.

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In this work, magnetic nanocomposite films were prepared using magnetorheological fluids and were characterized by time-domain terahertz spectroscopy.Applying magnetic field during the curing process of magnetorheological fluids makes Fe nanoparticles align into a chain-like structure. Permanent anisotropy is solidified in the films, resulting in a birefringence coefficient as high as 0.37 in a frequency range from 0.4 to 2.0 THz.The polarization state of terahertz wave can be converted by rotating the film at room temperature without external magnetic field. When the rotation angle is at 50°-60°, the ellipticity is greater than 0.8 in the frequency range of 1.19-1.6 THz, indicating that the film can be used as a quarter waveplate.

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Large terahertz birefringence in nanocomposite films made from magnetorheological fluid

Chen,

Zhu,

Huang

et al. 2023

Preprint

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In this work, magnetic nanocomposite films were prepared using magnetorheological fluids and were characterized by time-domain terahertz spectroscopy. Applying magnetic field during the curing process of magnetorheological fluids makes Fe nanoparticles align into a chain-like structure. Permanent anisotropy is solidified in the films, resulting in a birefringence coefficient as high as 0.37 in a frequency range from 0.4 to 2.0 THz. The polarization state of terahertz wave can be converted by rotating the film at room temperature without external magnetic field. When the rotation angle is at 50°- 60°, the ellipticity is greater than 0.8 in the frequency range of 1.19–1.6 THz, indicating that the film can be used as a quarter waveplate.

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Metal Wire Grid Terahertz Polarizer Fabricated by Femtosecond Laser Micro-Machining

Cited by 4 publications

References 0 publications

Resonant Coupling Effects in a Double-Layer THz Bandpass Filter

Resonant Coupling Effects in a Double-Layer THz Bandpass Filter

Large Terahertz Birefringence in Nanocomposite Films Made From Magnetorheological Fluid

Large terahertz birefringence in nanocomposite films made from magnetorheological fluid

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