Published October 1, 2007 | Version v1
Journal article Metadata-only

Terahertz electromagnetic-wave detector using Nb-based superconducting tunnel junction on LiNbO3 substrate absorber

Creators

  • 1. Department of Electrical and Electronic System, Saitama University, 255 Shimo-Ohkubo, Sakura, Saitama 338-8570 (Japan)
  • 2. RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

Description

We have been developing terahertz (THz) wave detectors using superconducting tunnel junctions (STJs). The STJs consist of the Nb/Al/AlOx/Al/Nb structure. We fabricated THz-wave detectors on LiNbO3 substrates that have a high absorption coefficient for the frequency range of 1012 Hz. Two kinds of signals were detected when the THz-wave was irradiated from the substrate side. One was an indirect signal related to the generation of phonons. The other was a signal that corresponds to directly generated quasi-particles in the Nb electrode of the STJ. The pulse height of the indirect signal was larger than that of the latter signal. To enlarge the detector area, we designed a STJ that has different areas of the base electrode and top electrode. In this paper, the characteristics of the THz-wave detector area will be discussed

Availability note (English)

Available from http://dx.doi.org/10.1016/j.physc.2007.03.500

Additional details

Identifiers

DOI
10.1016/j.physc.2007.03.500;
PII
S0921-4534(07)01065-9;

Publishing Information

Journal Title
Physica. C, Superconductivity
Journal Volume
463-465
Journal Page Range
p. 1119-1122
ISSN
0921-4534
CODEN
PHYCE6

Conference

Title
19. international symposium on superconductivity
Acronym
ISS 2006
Dates
30 Oct - 1 Nov 2006
Place
Nagoya (Japan)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39076295
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION; ELECTRODES; ELECTROMAGNETIC RADIATION; FREQUENCY RANGE; IRRADIATION; LITHIUM COMPOUNDS; NIOBATES; NIOBIUM COMPOUNDS; PHONONS; PULSES; SUBSTRATES; SUPERCONDUCTING JUNCTIONS; THZ RANGE
Descriptors DEC
ALKALI METAL COMPOUNDS; FREQUENCY RANGE; NIOBIUM COMPOUNDS; OXYGEN COMPOUNDS; QUASI PARTICLES; RADIATIONS; REFRACTORY METAL COMPOUNDS; SORPTION; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.