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Author Mou, S. S. ♦ Nakajima, H. ♦ Kumano, H. ♦ Suemune, I. ♦ Irie, H. ♦ Asano, Y. ♦ Akahane, K. ♦ Sasaki, M. ♦ Murayama, A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ COOPER PAIRS ♦ CRITICAL TEMPERATURE ♦ ELECTRONS ♦ INDIUM ARSENIDES ♦ LUMINESCENCE ♦ NIOBIUM ♦ PROXIMITY EFFECT ♦ QUANTUM DOTS ♦ RECOMBINATION ♦ SUPERCONDUCTORS ♦ TIME RESOLUTION ♦ WAVELENGTHS
Abstract 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 (T{sub C}) 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 T{sub C} is well explained with our theory including Cooper-pair recombination.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-08-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 7


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