Low loss porous terahertz fibers containing multiple subwavelength holes
Low loss porous terahertz fibers containing multiple subwavelength holes
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DOI：
10.1063/1.2840164
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发表时间：
2008-02-18
影响因子：
4
通讯作者：
Skorobogatiy, Maksim
中科院分区：
文献类型：
--
作者：
Hassani, Alireza;Dupuis, Alexandre;Skorobogatiy, Maksim
我们提出了一种多孔聚合物太赫兹光纤，其核心由亚波长空气孔的六边形阵列组成。数值模拟结果表明，导功率的大部分在光纤芯内的空穴内传播，导致芯材料的体吸收损失被抑制了10-20倍。在亚波长空穴中限制太赫兹功率大大降低了导模的有效折射率，但并没有大大增加由于弯曲引起的模态辐射损失。因此，可以容忍几厘米弯曲半径的紧密弯曲。(C) 2008年美国物理研究所。
We propose a porous polymer terahertz fiber with a core composed of a hexagonal array of subwavelength air holes. Numerical simulations show that the larger part of guided power propagates inside the air holes within the fiber core, resulting in suppression of the bulk absorption losses of the core material by a factor of similar to 10-20. Confinement of terahertz power in the subwavelength holes greatly reduces effective refractive index of the guided mode but not as much as to considerably increase modal radiation losses due to bending. As a result, tight bends of several centimeter bending radii can be tolerated. (C) 2008 American Institute of Physics.