Recovery time scales in a reversed-biased quantum dot absorber

Evgeny A. Viktorov, Thomas Erneux, Paul Mandel, Tomasz Piwonski, Gillian Madden, Jaroslaw Pulka, Guillaume Huyet, John Houlihan
2009 Applied Physics Letters  
The nonlinear recovery of quantum dot based reverse-biased waveguide absorbers is investigated both experimentally and analytically. We show that the recovery dynamics consists of a fast initial layer followed by a relatively slow decay. The fast recovery stage is completely determined by the intradot properties, while the slow stage depends on the escape from the dot to the wetting layer.
doi:10.1063/1.3159838 fatcat:2352dj4uhfe2jgmqhucam62e4a