Zero-dispersion waveguide of sub-skin-depth terahertz plasmons using metallic nanowires

• 作 者: 杨洁 钮月萍 林功伟 祁义红 龚尚庆
• 机 构: Department of Physics,East China University of Science and Technology,
• 出 处: Chinese Optics Letters
• 发表日期: 2013年08期
• 关键词: terahertz waveguide metallic systematically dispersive rigorous magnitude radius

Global change in the dispersive behavior of terahertz(THz) plasmons on metal wires with wide radii ranging from 5 nm to 0.5 mm is systematically investigated.Through rigorous numerical calculations,we find that the dispersion of a metal wire with a radius of 5 nm increases by about 4-6 orders of magnitude compared with the case of a metallic wire with a radius of 0.5 mm.Zero-dispersion points appear when the frequency is lower than 3 THz,and the positions of the zero-dispersion points can shift with the frequency.Finally,we provide an explicit expression that agrees very well with the numerical calculations.

Global change in the dispersive behavior of terahertz (THz) plasmons on metal wires with wide radii ranging from 5 nm to 0.5 mm is systematically investigated. Through rigorous numerical calculations, we find that dispersion of a metal wire with a radius of 5 nm increases by about 4-6 orders of magnitude compared with the case of a metallic wire with a radius of 0.5 mm. Zero-dispersion points appear when the frequency is lower than 3 THz, and the positions of the zero-dispersion points can shift with the frequency.Finally, we provide an explicit expression that agrees very well with the numerical calculations.