We report on recent progress towards single photon sources based on quantum dot and quantum post nanostructures which are manipulated using surface acoustic waves. For this concept acoustic charge conveyance in a quantum well is used to spatially separate electron and hole pairs and transport these in the plane of the quantum well. When conveyed to the location of a quantum dot or quantum post these carriers are sequentially captured into the confined levels. Their radiative decays gives rise to the emission of a train of single photons. Three different approaches using (i) strain- induced and (ii) self-assembled quantum dots, and (iii) self-assembled quantum posts are discussed and their application potential is discussed. First devices and initial experiments towards the realization of such an acoustically driven single photon source are presented and remote acoustically triggered injection into few individual emitters is demonstrated.
@article{arxiv.1011.5048,
title = {Recent progress towards acoustically mediated carrier injection into individual nanostructures for single photon generation},
author = {Stefan Völk and Florian J. R. Schülein and Florian Knall and Achim Wixforth and Hubert. J. Krenner and Arne Laucht and Jonathan J. Finley and Juha Riikonen and Marco Mattila and Markku Sopanen and Harri Lipsanen and Jun He and Tuan A. Truong and Hyochul Kim and Pierre M. Petroff},
journal= {arXiv preprint arXiv:1011.5048},
year = {2010}
}