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

Idutsu Yasuhiro | Zendy; Takada Makoto | Zendy; Hayashi Yujiro | Zendy; Akazaki Tatsushi | Zendy; Kumano Hidekazu | Zendy; Suemune Ikuo | Zendy

Open Access

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

Author(s) -

Idutsu Yasuhiro,

Takada Makoto,

Hayashi Yujiro,

Akazaki Tatsushi,

Kumano Hidekazu,

Suemune Ikuo

Publication year - 2009

Publication title -

physica status solidi c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.21

H-Index - 46

eISSN - 1610-1642

pISSN - 1862-6351

DOI - 10.1002/pssc.200880669

Subject(s) - niobium , luminescence , superconductivity , quantum dot , cooper pair , condensed matter physics , materials science , proximity effect (electron beam lithography) , intensity (physics) , optoelectronics , nanotechnology , physics , optics , layer (electronics) , resist , metallurgy , electron beam lithography

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 (T c ). About 3‐times enhancement was observed below T c . 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)

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research