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.
| Original language | English |
|---|---|
| Article number | 035407 |
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Physical Review B |
| Volume | 74 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 15 Jul 2006 |
| MoE publication type | A1 Journal article-refereed |