Opt Lett. 2013 Aug 15;38(16):3089-92. doi: 10.1364/OL.38.003089.
We propose a low-loss terahertz waveguide Bragg grating (TWBG) fabricated using a plasmonic two-wire waveguide and a micromachined paper grating for potential applications in terahertz (THz) communications. Two TWBGs were fabricated with different periods and lengths. Transmission spectra of these TWBGs show 16 dB loss and 14 dB loss in the middle of their respective stop bands at 0.637 and 0.369 THz, with Q factors of 142 and 105, respectively. Insertion loss of 1-4 dB in the whole 0.1-0.7 THz region was also measured. Finally, TWBG modal dispersion relations, modal loss, and field distributions were studied numerically, and low-loss, high-coupling-efficiency operation of TWBGs was confirmed.
我们提出了一种使用等离子体双线波导和微机械纸光栅制作的低损耗太赫兹波导布拉格光栅（TWBG），可用于太赫兹（THz）通信中的潜在应用。我们制作了两个具有不同周期和长度的 TWBG。这些 TWBG 的传输谱在其各自的截止带中间显示出 0.637 和 0.369 THz 处的 16 dB 和 14 dB 的损耗，相应的 Q 因子分别为 142 和 105。还测量了整个 0.1-0.7 THz 区域的 1-4 dB 的插入损耗。最后，通过数值研究了 TWBG 的模态色散关系、模态损耗和场分布，并证实了 TWBG 的低损耗、高效率耦合操作。
