ISSTT Proceedings

ISSTT Proceedings

You searched for:search icon

No Keywords
Showing 0 of items from your search. Start over 

Research of Micro-stripline STJ Detector for Terahertz Band

Authors:
Kenta Takahashi, Seiichiro Ariyoshi, Takashi Noguchi, Masahiko Kurakado, Kensuke Koga, Noboru Furukawa, Chiko Otani
Abstract:
We have proposed and demonstrated a new broadband and high efficiency THz wave detector using a superconducting tunnel junction (STJ). The detector consists of an impedance transformer and a long (micro-stripline) STJs, which are both located on a wing of a log-periodic antenna in the mirror-symmetrical arrangement. The detector utilizes the excess tunneling current caused by the Cooper pair breaking due to the radiation whose photon energy is greater than the energy gap of the used superconductor (around 0.7 THz for niobium). If the length of STJ is long enough compared with the mean free path of the emergent quasiparticles (~10 ┬Ám for niobium), the energy of THz waves is absorbed and we detect it. We have fabricated the device and performed the experiments for confirming the principle of this detector. We have succeeded the detection for the first time and the detector has sensitivity from 0.35 THz by the CPB process and some peaks by the PAT process.
Categories:
Poster Session, Miscellaneous
Year:
2012
Session:
P
Full-text:
Download a PDF of this paper.
Page Number(s):
173-175