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arXiv 1009.2667physics.opticsphysics.chem-ph
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高refractive index复合材料的太赫兹光波导:折射率对比度和吸收损耗的折衷

High refractive index composite materials for THz waveguides: trade-off between index contrast and absorption loss

Bora Ung, Alexandre Dupuis, Karen Stoeffler, Charles Dubois, Maksim Skorobogatiy

摘要:

制备了二氧化钛掺杂聚乙烯的聚合物复合物,并用太赫兹-TDS表征了其线性光学性能。我们发现,高浓度的掺杂剂不仅提高了复合材料的折射率,而且可以显着提高其吸收系数。我们表明,布拉格反射器的设计基于有损耗的复合聚合物依赖于找到一个折衷的折射率对比度和相应的损失。与理想的无损反射器相比,小的吸收值也被示出是有利的,因为它使得能够平滑传输通带。制作的空芯布拉格光纤的传输测量证实了模拟结果。

英文摘要:

Polymer compounds from titania-doped polyethylene are fabricated and their linear optical properties characterized by THz-TDS. We show that high concentration of dopants not only enhances the refractive index of the composite material, but also can dramatically raise its absorption coefficient. We demonstrate that the design of Bragg reflectors based on lossy composite polymers depends on finding a compromise between index contrast and corresponding losses. A small absorption value is also shown to be favorable, compared to an ideal lossless reflector, as it enables to smooth the transmission passbands. Transmission measurements of a fabricated hollowcore Bragg fiber confirm simulation results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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