Optical pumping of charged excitons in unintentionally doped InAs quantum dots

Autor:	Munoz-Matutano, G., Alen, B., Martinez-Pastor, J., Seravalli, L., Frigeri, P., Franchi, S.
Rok vydání:	2007
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Nanotechnology 19 (2008) 145711
Druh dokumentu:	Working Paper
DOI:	10.1088/0957-4484/19/14/145711
Popis:	As an alternative to commonly used electrical methods, we have investigated the optical pumping of charged exciton complexes addressing impurity related transitions with photons of the appropriate energy. Under these conditions, we demonstrate that the pumping fidelity can be very high while still maintaining a switching behavior between the different excitonic species. This mechanism has been investigated for single quantum dots of different size present in the same sample and compared with the direct injection of spectator electrons from nearby donors. Comment: 4 pages and 3 figures submitted to APL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0704.2319 Zobrazit plný text záznamu View this record from Arxiv