[9p-M111-1~11] Quantum sensing toward ultimate sensitivity

[9p-M111-10] Terahertz spectroscopy of single molecules and single atoms by using nanogap electrodes

〇Kazuhiko Hirakawa¹, Shaoqing Du¹, Kenji Yoshida¹, Ya Zhang^1,2, Chiu-Chun Tang¹, Takuma Tsurugaya¹ (1.IIS/INQIE, Univ. of Tokyo, 2.TUAT)

Keywords:terahertz, nanogap electrodes, single molecule spectroscopy

Clarifying dynamical properties of nanostructures provides key insights to future nanoelectronics and quantum information technologies. Because of the long-wavelength nature of the THz radiation, however, it has been a formidable challenge to overcome the diffraction limit and focus THz radiation on nanostructures. Here, we report on the THz spectroscopy of single molecules by using source and drain electrodes separated by a sub-nm gap as a THz antenna. This scheme provides a novel opportunity for investigating sub-ps THz dynamics of sub-nm scale systems.