Ultrafast all optical switching via tunable Fano interference.
Tunneling induced quantum interference experienced by an incident probe in asymmetric double quantum wells can easily be modulated by means of an external control light beam. This phenomenon, which is here examined within the dressed-state picture, can be exploited to devise a novel all-optical ultrafast switch. For a suitably designed semiconductor heterostructure, the switch is found to exhibit frequency bandwidths of the order of 0.1 THz and response and recovery times of about 1 ps.
Wu
Jin-Hui
JH
College of Physics, Jilin University, Changchun 130023, People's Republic of China. wujinhui0431@sina.com
Gao
Jin-Yue
JY
Xu
Ji-Hua
JH
Silvestri
L
L
Artoni
M
M
La Rocca
G C
GC
Bassani
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