Experimental investigation towards a periodically pumped single-photon source

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Research units

  • Ludwig-Maximilians-University
  • Augsburg University


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.


Original languageEnglish
Article number035407
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Issue number3
Publication statusPublished - 15 Jul 2006
MoE publication typeA1 Journal article-refereed

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