Observation of enhanced luminescence emitted from InAs quantum dots with direct contact to superconducting niobium stripe
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概要
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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)
- Wiley-Blackwellの論文
著者
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Suemune Ikou
Research Institute For Electronic Science Hokkaido University
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Hayashi Yujiro
Research Institute For Electronic Science Hokkaido University
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Akazaki Tatsushi
Ntt Corp. Kanagawa Jpn
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