Superconducting Light-Emitting Diodes

被引：10

作者：

Mou, Sinthia Shabnam ^{[1
]}

Irie, Hiroshi ^{[2
]}

Asano, Yasuhiro ^{[3
]}

Akahane, Kouichi ^{[4
]}

Kurosawa, Hiroyuki ^{[1
]}

Nakajima, Hideaki ^{[1
]}

Kumano, Hidekazu ^{[1
]}

Sasaki, Masahide ^{[4
]}

Suemune, Ikuo ^{[1
]}

机构：

[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010020, Japan

[2] NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Hokkaido Univ, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan

[4] Natl Inst Informat & Commun Technol, 4-2-1 Nukuikitamachi, Koganei, Tokyo 1848795, Japan

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2015年 / 21卷 / 02期

关键词：

Superconductivity; light emitting diode (LED); semiconductor epitaxial layers; quantum dots (QDs); QUANTUM; STATES;

D O I：

10.1109/JSTQE.2014.2346617

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Cooper pairs form spin singlet states and are regarded as entangled electron pairs. Extracting entangled electrons has been actively studied by the use of superconductor-normal metal junctions. We have proposed to convert Cooper pairs to entangled photon pairs via interband radiative recombination of Cooper pairs penetrated into a semiconductor by the proximity effect. We fabricated a superconducting (SC) light emitting diode, where a superconductor is used for the n-type electrode. We observed light output enhancement and recombination lifetime shortening below the SC critical temperature. Our observations were very well explained with an analysis based on a time-dependent perturbation theory of the radiative recombination. Superconductivity was included via the Bogoliubov transformation. We present our measurements on the Cooper-pair-enhanced luminescence from InAs quantum dots. We demonstrate the observation of sharp edge in the luminescence spectra that reflects the SC density of states.

引用

页数：11

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