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Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots
| Title: | Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots |
| Authors: | Mou, S. S. Browse this author | | Irie, H. Browse this author | | Asano, Y. Browse this author | | Akahane, K. Browse this author | | Nakajima, H. Browse this author | | Kumano, H. Browse this author →KAKEN DB | | Sasaki, M. Browse this author | | Murayama, A. Browse this author | | Suemune, Ikuo Browse this author →KAKEN DB |
| Issue Date: | 21-Aug-2015 |
| Publisher: | American Institute of Physics (AIP) |
| Journal Title: | Journal of Applied Physics |
| Volume: | 118 |
| Issue: | 7 |
| Start Page: | 073102-1 |
| End Page: | 073102-7 |
| Publisher DOI: | 10.1063/1.4928621 |
| Abstract: | We studied InAs quantum dots (QDs) where electron Cooper pairs penetrate from an adjacent niobium (Nb) superconductor with the proximity effect. With time-resolved luminescence measurements at the wavelength around 1550 nm, we observed luminescence enhancement and reduction of luminescence decay time constants at temperature below the superconducting critical temperature (T C) of Nb. On the basis of these measurements, we propose a method to determine the contribution of Cooper-pair recombination in InAs QDs. We show that the luminescence enhancement measured below T C is well explained with our theory including Cooper-pair recombination. |
| Rights: | © 2015 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 118, 073102 (2015) and may be found at http://dx.doi.org/10.1063/1.4928621 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/63169 |
| 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)
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Submitter: 末宗 幾夫
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