Published August 21, 2015 | Version v1
Journal article Metadata-only

Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots

Creators

  • 1. Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020 (Japan)
  • 2. NTT Basic Research Laboratories, NTT Corporation, Atsugi 243-0198 (Japan)
  • 3. Graduate School of Engineering, Hokkaido University, Sapporo 060-8628 (Japan)
  • 4. National Institute of Information and Communication Technology, Koganei 184-8795 (Japan)
  • 5. Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814 (Japan)

Description

We studied InAs quantum dots (QDs) where electron Cooper pairs penetrate from an adjacent niobium (Nb) superconductor with the proximity effect. With time-resolved luminescence measurements at the wavelength around 1550 nm, we observed luminescence enhancement and reduction of luminescence decay time constants at temperature below the superconducting critical temperature (TC) of Nb. On the basis of these measurements, we propose a method to determine the contribution of Cooper-pair recombination in InAs QDs. We show that the luminescence enhancement measured below TC is well explained with our theory including Cooper-pair recombination

Additional details

Identifiers

DOI
10.1063/1.4928621;

Publishing Information

Journal Title
Journal of Applied Physics
Journal Volume
118
Journal Issue
7
Journal Page Range
p. 073102-073102.7
ISSN
0021-8979
CODEN
JAPIAU

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47064956
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
COOPER PAIRS; CRITICAL TEMPERATURE; ELECTRONS; INDIUM ARSENIDES; LUMINESCENCE; NIOBIUM; PROXIMITY EFFECT; QUANTUM DOTS; RECOMBINATION; SUPERCONDUCTORS; TIME RESOLUTION; WAVELENGTHS
Descriptors DEC
ARSENIC COMPOUNDS; ARSENIDES; ELEMENTARY PARTICLES; ELEMENTS; EMISSION; FERMIONS; INDIUM COMPOUNDS; LEPTONS; METALS; NANOSTRUCTURES; PHOTON EMISSION; PHYSICAL PROPERTIES; PNICTIDES; REFRACTORY METALS; RESOLUTION; THERMODYNAMIC PROPERTIES; TIMING PROPERTIES; TRANSITION ELEMENTS; TRANSITION TEMPERATURE

Optional Information

Notes
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