A Cooper pair light emitting diode
H. Sasakura, S. Kuramitsu, Y. Hayashi, K. Tanaka, T. Akazaki, E., Hanamura, R. Inoue, H. Takayanagi, Y. Asano, I. Suemune

TL;DR
This paper demonstrates that Cooper pairs can significantly enhance radiative recombination in a semiconductor light emitting diode, opening new interdisciplinary avenues between superconductivity and optoelectronics.
Contribution
It introduces a novel Cooper-pair light emitting diode that leverages superconducting electron pairs to boost photon emission rates.
Findings
Enhanced photon generation rates due to Cooper pairs
Recombination involving Cooper pairs accelerates electric-dipole transitions
Potential for new superconductivity-optoelectronics interdisciplinary research
Abstract
We demonstrate Cooper-pair's drastic enhancement effect on band-to-band radiative recombination in a semiconductor. Electron Cooper pairs injected from a superconducting electrode into an active layer by the proximity effect recombine with holes injected from a p-type electrode and dramatically accelerate the photon generation rates of a light emitting diode in the optical-fiber communication band. Cooper pairs are the condensation of electrons at a spin-singlet quantum state and this condensation leads to the observed enhancement of the electric-dipole transitions. Our results indicate the possibility to open up new interdisciplinary fields between superconductivity and optoelectronics.
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