Experimental investigation towards a periodically pumped single-photon source

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2006
Major/Subject
Mcode
Degree programme
Language
en
Pages
035407/1-5
Series
Physical Review B, Volume 74, Issue 3
Abstract
Experiments towards a periodically pumped single-photon source are presented. The lateral piezoelectric field of a surface acoustic wave dissociates laser-generated two-dimensional excitons into electrons and holes. These carriers are separated by the wave potential and are transported over macroscopic length scales without recombining. When reaching a stress-induced quantum dot in the quantum well they periodically populate the zero-dimensional states and recombine, emitting single photons periodically in time according to the surface acoustic-wave frequency. We have successfully reduced the number of pumped quantum dots down to 100 and have detected a strong blinking photoluminescence signal. By further reducing the number of quantum dots down to 1 a periodically pumped single photon source could be realized.
Description
Keywords
single-photon sources, quantum dots, quantum wells, information technology
Other note
Citation
Bödefeld, C. & Ebbecke, J. & Toivonen, J. & Sopanen, M. & Lipsanen, Harri & Wixforth, A. 2006. Experimental investigation towards a periodically pumped single-photon source. Physical Review B. Volume 74, Issue 3. P. 035407/1-5. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.74.035407.