We analyze the strength of the nonlinear refractive index change associated with the saturation of the ground state absorption or gain of self-assembled quantum dot samples under cw optical injection. The model is based on a two-level framework but takes into account the strong coupling of quantum dots to the wetting layer by thermal excitations and Auger processes. Due to the inhomogeneous broadening and limited density the effect turns out to be weak though it should be experimentally detectable using self-lensing, the shift of Fabry-Perot resonances or interferometric schemes.
Nonlinear phase-shifts in self-assembled quantum dot samples under cw driving / Ackemann, T; Tierno, A; Barbay, S; Kuszelewicz, R; Brambilla, Massimo. - STAMPA. - (2010). (Intervento presentato al convegno 12th International Conference on Transparent Optical Networks, ICTON 2010 tenutosi a Munich, Germany nel 27 June -1 July 2010) [10.1109/ICTON.2010.5549301].
Nonlinear phase-shifts in self-assembled quantum dot samples under cw driving
BRAMBILLA, Massimo
2010
Abstract
We analyze the strength of the nonlinear refractive index change associated with the saturation of the ground state absorption or gain of self-assembled quantum dot samples under cw optical injection. The model is based on a two-level framework but takes into account the strong coupling of quantum dots to the wetting layer by thermal excitations and Auger processes. Due to the inhomogeneous broadening and limited density the effect turns out to be weak though it should be experimentally detectable using self-lensing, the shift of Fabry-Perot resonances or interferometric schemes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
