Tunable 3D Dirac-semimetals supported mid-IR hybrid plasmonic waveguides

He Xiaoyong; Liu Feng; Lin Fangting; Shi Wangzhou

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Tunable 3D Dirac-semimetals supported mid-IR hybrid plasmonic waveguides

机译：可调3D Dirac-Semimetals支持中红外混合等离子体波导

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Based on 3D Dirac-semimetal (DSM) modified hybrid waveguides, tunable propagation properties have been investigated, including the effects of Fermi levels, structural parameters, and operation frequency. The results show that if the operation frequency is smaller (larger) than the transition frequency (hw approximate to 2 vertical bar mu(c)), the proposed hybrid waveguides indicate strong (weak) confinement because the DSM layer manifests a high plasmonic (dielectric low) loss property. The dielectric fiber shape affects the propagation property obviously, as the elliptical parameter decreases, the confinement and figure of merit increase, and the loss reduces. With the increase in Fermi level, the propagation constant increases, and the frequency (amplitude) modulation depth is 32.31% (12.93%) if the Fermi level changes in the range of 0.01-0.15 eV. The results are very helpful in understanding the tunable mechanisms of hybrid wave-guides and designing novel plasmonic devices in the future, e.g., modulators, filters, lasers, and resonators. (C) 2021 Optical Society of America

机译：基于三维狄拉克半金属（DSM）改性混合波导，研究了可调谐传输特性，包括费米能级、结构参数和工作频率的影响。结果表明，如果工作频率小于（大于）过渡频率（hw约为2垂直条形mu（c）），由于DSM层表现出高等离子体损耗（低介电损耗）特性，所提出的混合波导显示出强（弱）约束。介质光纤的形状对传输特性有明显的影响，随着椭圆参数的减小，限制和优值增大，损耗减小。当费米能级在0.01-0.15ev范围内变化时，随着费米能级的增加，传播常数增加，频率（振幅）调制深度为32.31%（12.93%）。研究结果对理解混合波导的可调谐机制和设计未来新型等离子体器件（如调制器、滤波器、激光器和谐振器）非常有帮助。（2021）美国光学学会

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来源
《Optics Letters》 |2021年第3期|共4页
作者
He Xiaoyong; Liu Feng; Lin Fangting; Shi Wangzhou;
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Shanghai Normal Univ Math &

Sci Coll Dept Phys 100 Guilin Rd Shanghai 200234 Peoples R China;

Shanghai Normal Univ Math &

Sci Coll Dept Phys 100 Guilin Rd Shanghai 200234 Peoples R China;

Shanghai Normal Univ Math &

Sci Coll Dept Phys 100 Guilin Rd Shanghai 200234 Peoples R China;

Shanghai Normal Univ Math &

Sci Coll Dept Phys 100 Guilin Rd Shanghai 200234 Peoples R China;

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正文语种 eng
中图分类计量学;光学;
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Tunable 3D Dirac-semimetals supported mid-IR hybrid plasmonic waveguides

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