On-chip coil-integrated STJ using the persistent superconducting current for photon detectors

A superconducting tunnel junction (STJ) is very attractive for use in high-energy-resolution photon detectors because of its small energy gap. To detect a single photon, the Josephson current of the STJ has had to be suppressed by an external magnetic field. We demonstrated an on-chip coil-integrate...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2003-06, Vol.13 (2), p.1132-1135
Main Authors: Kikuchi, Katsuya, Taino, Tohru, Nanme, Masaki, Nakagawa, Hiroshi, Aoyagi, Masahiro, Sato, Hiroshi, Akoh, Hiroshi, Iizuka, Takeshi, Myoren, Hiroaki, Takada, Susumu, Maehata, Keisuke, Ishibashi, Kenji, Sato, Hiromi, Ikeda, Tokihiro, Otani, Chiko, Takizawa, Yoshiyuki, Oku, Takayuki, Kawai, Kazuhiko, Miyasaka, Hiromasa, Shimizu, Hirohiko M., Kato, Hiroshi, Watanabe, Hiroshi
Format: Article
Language:English
Subjects:
Applied sciences
Connection and protection apparatus
Electrical engineering. Electrical power engineering
Electrodes
Electromagnets
Electronics
Exact sciences and technology
Fabrication
Josephson effect
Josephson junctions
Magnetic fields
Niobium
Optoelectronic devices
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Shape
Superconducting coils
Superconducting devices
Various equipment and components
X-ray detectors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A superconducting tunnel junction (STJ) is very attractive for use in high-energy-resolution photon detectors because of its small energy gap. To detect a single photon, the Josephson current of the STJ has had to be suppressed by an external magnetic field. We demonstrated an on-chip coil-integrated STJ photon detector, which excludes the external magnetic field, allowing a small device size. A normal-distribution function shape was adopted for the superconducting electrodes, which makes the magnetic field supplied to the STJ small. We devise a new superconducting photon detector by combining the above techniques. A new Josephson switching gate is also integrated on the same detector chip in order to drive an on-chip integrated coil by a persistent superconducting current. This behavior was confirmed experimentally using the technology of the fabrication process of the Nb/Al-AlOx/Nb Josephson tunnel junction.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2003.814173