Terahertz (THz) has received significant attentions in recent years, as it promises tempting perspectives in multiple applications, such as sensing, imaging and spectroscopy, etc. However, most THz systems rely on free space propagation, where THz wave would experience significant loss. Moreover, most materials have high absorption loss in this spectral region. A new type of low loss THz waveguides is needed in order to promote the application of THz technologies. In this paper, we exploit a Teflon solid-core photonic crystal fiber (PCF) and its transmission characteristics have been numerically investigated in the THz band by using finite element method. Results show that in a large pitch length (E=2.0mm) dispersion could be as low as 0.01 ps/ (THz·cm) in the range of 1.0 to 2.5 THz. When d/E is larger than 0.45 and E larger than 1.0mm, the modal loss is as low as 0.25 cm-1. It can also be seen that confinement loss can be eliminated by proper design. The results can provide theoretical references for further studies in this area.

Date Published: 11 August 2011
PDF: 6 pages
Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81950Y (11 August 2011); doi: 10.1117/12.900610

Published in SPIE Proceedings Vol. 8195:
International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications
X.-C. Zhang; Jianquan Yao; Cunlin Zhang; Zhenzhan Wang, Editor(s)