[18a-WL2_301-1~10] 3.8 Terahertz technologies

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[18a-WL2_301-9] Circular polarized terahertz detector based on twisted carbon nanotube fiber p-n junction

〇Satoshi Kusaba^1,2, Miguel Angel Lopez Carrillo¹, Koki Shiba¹, Shigeki Saito¹, Ryo Tamaki^2,3, Shizuka Tsuzuki⁴, Tsukasa Matsuura⁴, Jun Takeda^2,5, Ikufumi Katayama², Kazuhiro Yanagi¹ (1.Tokyo Metro. Univ., 2.Yokohama Natl. Univ., 3.Keio Univ., 4.Tokai Rika Co., Ltd., 5.Shibaura Inst. Tech.)

Keywords:

carbon nanotube,terahertz,photothermoelectric effect

Carbon nanotubes (CNT) have great attraction as materials for terahertz (THz) photothermoelectric detectors due to their excellent absorption properties spanning from the visible to the THz range and large thermoelectric power arising from their one-dimensionality [X. He et al., Nano Lett. 14, 3953 (2014)]. In this study, we demonstrate a THz pyroelectric sensor based on a p–n junction by just hooking chemically doped p-type and n-type CNT fibers. Besides, we found that twisted fiber p-n junction can detect circular polarized THz light selectively.