[21a-221A-1~8] 9.3 Nanoelectronics

▼ [21a-221A-7] THz Rectification through a Single Metal Nanoparticle

〇(PC)Shaoqing Du¹, Kenji Yoshida¹, Ya Zhang¹, Chiu-Chun Tang¹, Tomoki Nishimura², Alka Singh², Hiroshi Inokawa², Kazuhiko Hirakawa¹ (1.IIS & INQIE,UTokyo, 2.RIE,Shizuoka Univ.)

Keywords:terahertz, rectification, single electron transistor

The nanogap electrode is a good experimental tool to study low-dimensional materials, such as single molecules (0D), carbon nanotubes (1D), and graphene (2D). By using nanogap electrode as an antenna to focus terahertz (THz) radiation onto the sample, we have observed ultrafast dynamic processes of molecules/atoms (e.g., molecular vibration¹) and electrons (e.g., photon-assisted tunneling², intersublevel transitions³) at a sub-ps time scale. The magnitude of the THz electric fields in the nanogap determines what kind of mechanism takes place in the THz-induced single electron transport in the nanogap electrodes. However, the exact magnitude of the THz electric field is difficult to measure. Therefore, the purpose of this work is to develop a technique to exactly determine the THz electric fields within the nm-scale gap of the electrodes.