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Observation of enhanced luminescence emitted from InAs quantum dots with direct contact to superconducting niobium stripe

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Title: Observation of enhanced luminescence emitted from InAs quantum dots with direct contact to superconducting niobium stripe
Authors: Idutsu, Yasuhiro Browse this author
Takada, Makoto Browse this author
Hayashi, Yujiro Browse this author
Akazaki, Tatsushi Browse this author
Kumano, Hidekazu Browse this author →KAKEN DB
Suemune, Ikuo Browse this author →KAKEN DB
Keywords: 74.90.+n
78.55.Cr
78.67.Hc
Issue Date: Apr-2009
Publisher: Wiley-Blackwell
Journal Title: Physica Status Solidi C Conferences
Volume: 6
Issue: 4
Start Page: 849
End Page: 852
Publisher DOI: 10.1002/pssc.200880669
Abstract: Observation of drastically enhanced luminescence emitted from InAs quantum dots (QDs) which were in direct contact to superconducting Niobium (Nb) is reported. Although the PL intensity was essentially temperature independent without Nb stripe, drastic temperature dependence was observed with the presence of the Nb stripe. PL intensity was substantially increased below the Nb superconducting critical temperature (Tc). About 3-times enhancement was observed below Tc. This phenomenon is attributed to the Cooper pairs penetrated from the superconducting Nb stripe to adjacent InAs QDs by the proximity effect. This is the first experimental demonstration that the Cooper pairs enhance radiative recombination through QDs. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Rights: This is the pre-peer reviewed version of the following article: physica status solidi (c)Volume 6, Issue 4, pages 849–852, April 2009, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pssc.200880669/abstract.
Type: article (author version)
URI: http://hdl.handle.net/2115/45361
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 末宗 幾夫

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